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Copyright of Rock & Mineral Analysis is the property of Editorial Board of Rock & Mineral Analysis and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Rock & Mineral Analysis is the property of Editorial Board of Rock & Mineral Analysis and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Rock & Mineral Analysis is the property of Editorial Board of Rock & Mineral Analysis and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Rock & Mineral Analysis is the property of Editorial Board of Rock & Mineral Analysis and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Rock & Mineral Analysis is the property of Editorial Board of Rock & Mineral Analysis and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Rock & Mineral Analysis is the property of Editorial Board of Rock & Mineral Analysis and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Because of the lower cadmium and tin concentration in lead alloys, the ideal detection limits can't be achieved by the national standard method. The method for determinating trace cadmium and tin elements in lead alloys by ICP-MS was established according to the nature and characteristics of the lead alloys in this paper. Using single low concentration of nitric acid to dissolve lead alloy samples, the make alloy sample was fully dissolved to reduce the multiple ion interference.By matching the lead matrix and adding tartrate, the consistency of the standard and sample medium was effectively established to avoid the tin hydrolysis.As internal standard, The 103Rh effectively eliminated the sampling and instrument fluctuations. As the measuring isotope 111Cd and 118Sn, the mass spectrometry interference was overcome. The Cd detection limit was 0.05 ng/g, Sn 0.04 ng/g. The detection limit is much lower than that of the national standard method (1-6 μg/g).The respective RSD was inferior to 4.0%. With the high sensitivity and lower interference, the method had the advantages of reducing the sampling complexity, shortening the cycle and reducing the cost analysis. [ABSTRACT FROM AUTHOR]

BACKGROUND: The geochemical exploration for gold deposits is based on the accurate determination of gold. The content of gold in geochemical samples is usually at the level of ng/g, which needs to be preconcentrated before determination by inductively coupled plasma-mass spectrometry (ICP-MS) or graphite furnace absorption spectroscopy (GFAAS). At present, the exploration of buried deposits is the frontier of geochemical exploration technology and the extraction of mobile forms of gold is one of the most effective approaches to find concealed gold deposits. Compared with whole rock gold analysis, the mobile forms of gold content is much lower, which requires specific leaching, efficient preconcentration and accurate determination. OBJECTIVES: To selective extract mobile forms of gold gold and find surface secondary anomaly information for exploring concealed ore bodies. METHODS: Experiments were carried out on the extraction agent and determination of mobile forms of gold by ICP-MS. Ammonium citrate was used to promote the disassociation of the adsorption of exchangeable form gold from the surface of clay minerals and secondary minerals in the soil. The complexation of thiourea and sodium thiosulfate was applied to diffuse the extracted gold into the solution to achieve the purpose of selective extraction. The procedure for gold preconcentration from extraction solution and the ICP-MS determination method were established. RESULTS: The experiments determined that the extractant was composed of 5g/L ammonium citrate, 2g/L thiourea, and 5g/L sodium thiosulfate. The extraction time was 24h, and the active carbon was used to preconcentrate gold in the acidic thiourea medium. The gold adsorption rates were 89.6%-109.2%, and the ashing temperature of the concentration materials were 650-700℃. The detection limit of the method was 0.05ng/g, the relative standard deviations (RSDs) ranged from 9.4% to 10.2%, and the recoveries were from 91.2% to 93.4%. CONCLUSIONS: Compared with the published method, extraction with ferric sulfate-thiourea-sodium thiosulfate solution and determination by GFAAS, this method has the advantages of low detection limit, wide linear range and fast analysis. This method has been successfully applied in the geochemical exploration of gold deposits in the forest swamp landscape area of Dongan, Heilongjiang Province. Gold anomaly delineated is consistent with the location of the concealed gold deposit [ABSTRACT FROM AUTHOR]

BACKGROUND: In recent years, the pollution of synthetic musk in the environment has increased. This kind of material has potential carcinogenic and environmental hormone effects and poses a threat to human health. Therefore, it has attracted increasing attention from scientists. The analytical technology of synthetic musk in environmental samples such as water and soil has developed rapidly. The concentration of synthetic musk in sediments has reached several thousand ng/g, but the methods for the simultaneous extraction and purification and rapid analysis of various types of synthetic musk in complex matrices of sediments are yet to be studied. OBJECTIVES: To establish a rapid method for the analysis of 14 typical synthetic musks in sediment samples by ASE combined with gas chromatography-triple quadrupole tandem mass spectrometry (GC-MS/MS). METHODS: Accelerated solvent extraction was used for sample preparation. The ASE cell was filled up with sorbent (0.4g GCB combined with 1.0g SAX) and 5.0g sediment samples. The sample was extracted in two cycles with mixed solvents hexane-acetone (V/V,4:1) at 80℃. After preconcentration, the extracted solution was determined by GC-MS/MS. RESULTS: The linear range of this method for fourteen target compounds ranged from 5ng/mL to 200ng/mL. The average spike-added recoveries ranged from 70.6% to 121.5%, the relative standard deviations (RSD, n=7) were 0.97%-19.5%. The recoveries of surrogates were 72.2%-116.8%. The detection limits of the method were 0.10-0.19ng/g for nitro musk, 0.09-0.14ng/g for polycyclic musk, and 0.11-1.93ng/g for macrocyclic musk. CONCLUSIONS: This method can satisfy the analysis of musk in sediments with complex matrices. [ABSTRACT FROM AUTHOR]

BACKGROUND: Rice is the staple food of about half of the world's population, and the dependence of Asian staple food on rice exceeds 90%. There are varying degrees of arsenic (As) pollution all over the world. As can accumulate in rice and enter the human body, causing health problems. OBJECTIVES: To reveal the mechanism of As absorption in rice. METHODS: The content and species characteristics of As absorbed by rice and the species analysis techniques were reviewed. The mechanisms of As absorption, tolerance and detoxification by rice were summarized. RESULTS: The content of As in rice ranged from a few to several hundred ng/g. The process of As entering the rice from the soil involved complex physical and chemical changes and species transformation. Arsenic mainly existed in the form of arsenate, arsenite, thiol and methyl coordination in rice. Field water management, fertilization and soil amendments controlled the absorption of As in rice. Each technique had their advantages and disadvantages. Soil pH, redox conditions, organic matter and coexisting elements were the key factors affecting As absorption by rice. Agronomic methods can control the absorption of As by rice. Many factors such as arsenic biogeochemistry and the absorption and metabolism of arsenic in rice agroecosystems affect the concentration of arsenic in rice and grain. Comprehensive consideration of the effects of agronomic activities on soil pH, redox conditions, organic matter structure and coexisting elements, and different geographic factors such as soil characteristics and economic factors were the keys to realize the control of arsenic absorption by rice in production practice. CONCLUSIONS: Comprehensive use of multiple agronomic methods for rice farming is an important way to control the absorption of arsenic in rice in the future. Application of new agronomic methods in the control of arsenic absorption by rice, the impact of climate change on arsenic absorption by rice, and application of non-destructive in situ and in vivo analysis techniques for As speciation analysis, are keys for more scientifically and effectively controlling the arsenic content in rice and reducing the risk of human As exposure on the global scale in the future. These are also the key development directions and challenges in the future. [ABSTRACT FROM AUTHOR]

BACKGROUND: The quality of rapeseed and the degree of heavy metal pollution are directly related to human health. Monitoring the content of toxic elements such as As, Sb, Cd, and Tl in rapeseed is helpful for early monitoring of raw materials for edible oil production. OBJECTIVES: To avoid the cumbersome pretreatment of strong acid digestion, quickly determine the accurate content of volatile toxic elements such as As, Sb, Cd, and Tl in rapeseed, and to solve the challenge of pretreatment due to the heavy fat content of grains, oils, and foods. METHODS: A suspension - emulsion synergistic sample preparation technique was used to investigate conditions affecting suspension - emulsion, and a homogeneous and stable slurry - emulsion solution (SES) system was prepared. In the electrothermal vaporizer (ETV) with high sampling efficiency, the temperature - programmed parameters and the dosage of improver palladium nitrate were all optimized. SES was directly injected, and inductively coupled plasma - mass spectrometry (ICP - MS) was used to determine As, Sb, Cd and Tl. RESULTS: The overall reproducibility (relative standard deviation, RSD) of the suspension - emulsion sampling - ETV - ICP - MS detection method were 10.1%, 8.8%, 8. 9% and 6. 4% [ c =0. 5% ( m/V), n = 5 J for As, Sb, Cd and Tl, respectively. Under the optimum conditions, the limits of detection ( 3CT) were 40. 0ng/L, 20. 0 ng/L, 50.0ng/L and 10.0ng/L for As, Sb, Cd and Tl, respectively. Accordingly, the limits of detection for the original solid samples were 8.0ng/g, 4.0ng/g, 10.0 ng/g and 2.0ng/g for As, Sb, Cd and Tl, respectively. The contents of As, Sb, Cd and Tl in tested rapeseed samples were 50. 4 - 90. 5 ng/ g, 28.0 - 59. 9ng/ g, 51. 3 - 69.1 ng/g and 91. 3 -216. 6ng/g, respectively. CONCLUSIONS: The suspension - emulsion synergistic treatment of rapeseed with high oil content is simple, fast, and cost efficient. It utilizes the advantages of ETV sampling and promotes the application of ETV - ICP - MS solid sampling analysis. [ABSTRACT FROM AUTHOR]

Copyright of Rock & Mineral Analysis is the property of Editorial Board of Rock & Mineral Analysis and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Determination of low-level gold in geochemical samples by Graphite Furnace Atomic Absorption Spectrometry (GFAAS) has good accuracy. However, this method is limited to the determination of trace gold in plants due to the large sample amount of > 20 g required, incomplete ashing in the muffle furnace, and a high detection limit of 0. 29 ng/g. A revised method of determining trace gold in plant samples from a gold mining area by GFAAS is proposed. The heating process in a graphite furnace Involves ashing and atomization temperatures of 1000 °C and 2000 °C, respectively, and ascorbic acid is used as the matrix modifier. Sample ashing temperature of 500°C and an ashing time of 2. 0 h in a porcelain crucible can guarantee the complete ashing of samples and avoid volatilization loss. This method uses small weight samples of 5.0g, the detection limit is 0.03 ng/g, the precision is 6. 8% -11.9%, and standard addition recoveries are 83. 8% -104. 7%. It was also found that different plants have different capacities of gold enrichment with maize containing the highest enrichment. [ABSTRACT FROM AUTHOR]

BACKGROUND: Metal activity state measurement method is one of the effective means to find hidden ore. However, during the application of the method, it was found that the types of effective activity states of gold in different geochemical landscape conditions were not the same. Moreover, it was found that the conditions such as solid-liquid ratio, temperature and time during the extraction would have a significant impact on the active state extraction data. OBJECTIVES: To solve the problems of selective extraction and accurate determination of the active state of gold. METHODS: A comparative study of different experimental conditions and samples of different grain sizes for the active state extraction of gold from the Wangjiaping gold deposit in the Qinling area using ICP-MS analysis. RESULTS: The optimal extraction conditions for gold element water extraction state, clay adsorption state, organic binding state and iron manganese oxide state were determined. Solid-liquid ratio was 1∶5, the extraction time was 24 h, the extraction temperature was 35℃ and the sample size range was-80 mesh. The method detection limits for the four phase states of elemental gold were 0.03 ng/g for water extraction state 0.03 ng/g for clay adsorption state, 0.04 ng/g for organic binding state, 0.05 ng/g for iron manganese oxide state. The relative standard deviation (RSD) was 7.25%-9.02%. In the 23 rd line of the Wangjiaping gold deposit, the average content of the water extracted state gold was 0.19×10-9, the average clay adsorption state gold was 0.30×10-9, the average organic binding state gold was 11.16×10-9, and the average iron manganese oxide state gold was 0.20×10-9. CONCLUSIONS: The organic binding state is the main active phase state of gold in the soil of the mining area, and the abnormality of the organic binding state of gold is consistent with the position of the hidden gold ore body. [ABSTRACT FROM AUTHOR]

Copyright of Rock & Mineral Analysis is the property of Editorial Board of Rock & Mineral Analysis and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Rock & Mineral Analysis is the property of Editorial Board of Rock & Mineral Analysis and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

BACKGROUND: The detection sensitivity, stability, and linearity of Au using flame atomic fluorescence spectrometry (FAFS) are comparable to the method of ICP-MS. But Au below 0.5 ng/g is difficult to accurately detect if the interference elements in FAFS are not separated and eliminated. OBJECTIVES: The optimized conditions for trace Au detection using FAFS are provided in this study based on the conventional Au separation and enrichment method of polyurethane foam plastics (PUFP). METHODS: The thiourea (3.0 g/L) and HCl (1%) adopted as desorption solution can effectively eliminated the Au memory effect after separation by PUFP with low Au background value (≤ 0.25 ng/g), and 5 μg/mL of Fe3+ solution added into Au standard series solutions is used to eliminated the interference factors in Au detection using FAFS. RESULTS: FAFS runs at aforementioned conditions is used to analyze the standard materials as GBW07805, GBW07242,GBW07244a, GBW07245a and GBW07247 and the RE and RSD are lower than 4.7% and 23.2%. The Au contents for 90 primary halo samples and 4 control samples are analyzed simultaneously using FAFS and ICP-MS. The detection result indicating that no significant difference exists between two methods with the F=1.23 and the correlation coefficient is 1.01, which further proves the accuracy and reliability of FAFS. Method detection limit of Au (MDL) was as low as 0.08ng/g, also its linear range(0.08-500ng/g) is up to three orders of magnitude. CONCLUSIONS: FAFS is simple, convenient, fast and practical characteristics. [ABSTRACT FROM AUTHOR]

Copyright of Rock & Mineral Analysis is the property of Editorial Board of Rock & Mineral Analysis and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Rock & Mineral Analysis is the property of Editorial Board of Rock & Mineral Analysis and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Rock & Mineral Analysis is the property of Editorial Board of Rock & Mineral Analysis and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Rock & Mineral Analysis is the property of Editorial Board of Rock & Mineral Analysis and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Rock & Mineral Analysis is the property of Editorial Board of Rock & Mineral Analysis and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

BACKGROUND: Hydride generation - atomic fluorescence spectroscopy (HG - AFS) is highly sensitive for the determination of trace selenium in geological samples. However, the complex matrix increases the analysis difficulty, especially owing to interference caused by organic carbon, complicated complexes, and coexisting ions in samples rich in organic matter and sulfides. Therefore, sample pretreatment is important. The use of conventional thiol cotton fiber (TCF) to enrich and separate selenium often leads to unstable recovery and premature saturation of the TCF when dealing with samples rich in organic matter and sulfides. OBJECTIVES: To establish a method suitable for the determination of trace selenium in geological samples rich in organic matter and sulfides. METHODS: For samples rich in organic matter, a double TCF column m = 0.15g) was used to carry out adsorption twice. The recovery for high-sulfur geological samples could be increased either by increasing the amount of TCF (mc 0.2g) or reducing the sample amount. RESULTS: The measurement results for the reference materials and actual samples showed that the optimized method satisfied the analysis requirements as selenium recoveries of >95, 1% and >95.5% were achieved for the organic - rich and sulfide samples, respectively. Microwave digestion can effectively avoid the loss of selenium during digestion; the measured selenium content was consistent with that reported in the literature. CONCLUSIONS: The improved method is suitable for geological samples rich in organic matter and sulfides, which can be used to determine trace selenium (ng/g to pg/g levels) in geological samples. [ABSTRACT FROM AUTHOR]

Isobaric ions interfere with two isotopes of Ag during determination by Inductively Coupled Plasma-Mass Spectrometry (ICP-MS), i.e., 90Zr16O1H and 91Zr16O on 107Ag, and 92Zr16O1H and 93Nb16O on 109Ag. Although an interference correction coefficient method was used for the calibration of the analytical results, the analytical errors remain serious. In the proposed method, samples were closed decomposed by nitric acid, hydrofluoric acid, and perchloric acid. Ammonia was used to precipitate Zr and the purified Ag was determined by ICP-MS using 103Rh as the internal standard. The interference caused by the residual Zr was calibrated by the interference coefficient method. The method has a detection limit (3σ) of 4.1 ng/g and relative standard deviation (n =12) ranging from 2.5% to 7.8%. Determination of Ag in 53 primary certified materials of geochemical exploration indicates no loss of Ag. Using ammonium as the reagent, separation of Zr and Ag was successfully achieved due to the formation of the stable Ag-ammonium complex and Zr-hydroxide precipitate. The separation of Ag from Zr has reduced the interferences of Zr on Ag. Compared with the high-pressure sealed decomposition method and the P507 extraction resin separation method, the closed sample decomposition method is much simpler with less acid used and a lower blank. [ABSTRACT FROM AUTHOR]

Copyright of Rock & Mineral Analysis is the property of Editorial Board of Rock & Mineral Analysis and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Rock & Mineral Analysis is the property of Editorial Board of Rock & Mineral Analysis and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Rock & Mineral Analysis is the property of Editorial Board of Rock & Mineral Analysis and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

BACKGROUND: Persistent organic pollutants (POPs), pharmaceuticals, personal care products ( PPCPs) and disinfection by products (DBPs) have raised significant concerns for their potential ecological threat to the environment and human health. Research on their source, detection method, environmental distribution, migration and transformation has become the hot topic. OBJECTIVES; To introduce recent analytical techniques and applications for the determination of POPs, PPCPs and DBPs in environmental and biota samples, and summarize the extraction, separation and instrumental analyses of the halogenated emerging organic pollutants. To discuss future trends for improving the POPs, PPCPs and DBPs analyses and potential emerging organic pollutants. METHODS: In recent years the analytical techniques for emerging organic pollutants have made great progress. According to the nature of samples, a variety of extraction methods have been used, such as accelerated solvent extraction and solid phase microextraction. Effective clean-up steps include GPC, multi-layer column and SPE. Conventional analytical methods of emerging organic pollutants have been based mainly on GC-ECD. With the fast development of chromatography and mass spectrometry, congener-specific analysis has become a mainstream method. The analysis of certain emerging organic pollutants at trace levels is now a routine due to the advancement of HRGC-HRMS. RESULTS: Methods for the analysis of emerging organic pollutants in a variety of environmental, biota and food matrices have been well developed during the past several decades. However, the analytical challenge still remains for a direct analysis of emerging pollutants. For example, short chain chlorinated paraffin has more than 7000 kinds of congeners. The traditional analytical methods cannot achieve their separation, and accurate qualitative and quantitative analysis of these pollutants is challenging. CONCLUSIONS: Tlie analytical technique for emerging organic pollutants still has a long way to go. On the one-hand, it is necessary to explore effective pretreatment techniques such as magnetic solid - phase matrix dispersion extraction technology to reduce the possible interference. On the oilier liand. it is necessary to improve the recognition, sensitivity, accuracy and practicability of chromatograhY mass spectrometry techniques such as comprehensive Two-dimensional Gas Chromatograhy and Fourier Transform Mass Spectrometry and develop a simple and standard quantitative method. [ABSTRACT FROM AUTHOR]

Copyright of Rock & Mineral Analysis is the property of Editorial Board of Rock & Mineral Analysis and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Rock & Mineral Analysis is the property of Editorial Board of Rock & Mineral Analysis and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Rock & Mineral Analysis is the property of Editorial Board of Rock & Mineral Analysis and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Rock & Mineral Analysis is the property of Editorial Board of Rock & Mineral Analysis and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Characteristics of REEs in peridotite is significant for studying petrogenesis and magmatic processes. Due to the serious interference of matrix elements such as Mg and Fe, it is difficult to determine the low contents of REEs in peridotite ( X REE =0. 1 - 1 µ.g/g) accurately. The previous method was sealed acid digestion at high pressure combined with ion-exchange which was used to separate REEs and matrix elements of Mg and Fe and preconcentrate REEs. However, due to the long digesting time (almost 7 days) and various operating steps, it is not conducive to the analysis of lots of samples. In this study, the sample was decomposed by Na2O2, alkali fusion, and coprecipitated with Mg(OH)2 and Fe(OH)3. Then, the solution was separated from precipitation by centrifuging for a rapid separation of REEs from matrix elements of Mg and Fe. Contents of REEs are determined by Inductively Coupled Plasma-Mass Spectrometry ( ICP-MS). For this method, the detection limits of REEs range from 0. 17 to 2. 18 ng/g, and the recoveries are 95% - 101%. This method was used to analyze the national standard reference materials GBW07101 and GBW07102. The relative error between analytical results and recommended values is less than 20% , and the relative standard deviation ( RSD. n = 11) is less than 10%. The method not only reduces the losses caused by stepped precipitation, but also shortens the analysis period (only one day for sample-digestion). It is simple to operate, and efficient in analysis. [ABSTRACT FROM AUTHOR]

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Copyright of Rock & Mineral Analysis is the property of Editorial Board of Rock & Mineral Analysis and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Rock & Mineral Analysis is the property of Editorial Board of Rock & Mineral Analysis and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Rock & Mineral Analysis is the property of Editorial Board of Rock & Mineral Analysis and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Rock & Mineral Analysis is the property of Editorial Board of Rock & Mineral Analysis and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Rock & Mineral Analysis is the property of Editorial Board of Rock & Mineral Analysis and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Rock & Mineral Analysis is the property of Editorial Board of Rock & Mineral Analysis and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Rock & Mineral Analysis is the property of Editorial Board of Rock & Mineral Analysis and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Rock & Mineral Analysis is the property of Editorial Board of Rock & Mineral Analysis and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Rock & Mineral Analysis is the property of Editorial Board of Rock & Mineral Analysis and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Rock & Mineral Analysis is the property of Editorial Board of Rock & Mineral Analysis and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Rock & Mineral Analysis is the property of Editorial Board of Rock & Mineral Analysis and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Rock & Mineral Analysis is the property of Editorial Board of Rock & Mineral Analysis and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)