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Your search keyword '"Hydrogen selenide"' showing total 3 results
Start Over Descriptor "Hydrogen selenide" Journal international journal of environmental analytical chemistry
3 results on '"Hydrogen selenide"'

1. Preconcentration of hydrogen selenide using hydride generation and purge-and-trap collection for the determination of selenium in water samples by atomic absorption spectrometry.

Author

Ueta, Ikuo, Kato, Daiki, and Nagao, Masanori

Subjects
*WATER sampling, *FURNACE atomic absorption spectroscopy, *SELENIUM, *HYDRIDES, *SPECTROMETRY, *HYDROGEN
Abstract

Gaseous hydrogen selenide (H2Se) generated by the addition of sodium tetrahydroborate (NaBH4) into an acidic aqueous sample was collected using an aqueous ammonia solution. The selenium (Se) concentration was determined using graphite furnace atomic absorption spectrometry (AAS). Several experimental conditions, such as the type of the collection solution, volume of NaBH4 and hydrochloric acid, and collection time, were optimized. In addition, the effect of coexisting ions was quantitatively evaluated and eliminated. The limit of detection for Se in a standard water sample was 1.3 ng/mL. The additional recovery of spiked Se in tap water and river water samples ranged from 98 ± 2.4 to 100 ± 2.2%. The proposed method facilitates simple and sensitive analysis for Se in water samples without H2Se gas generator for AAS. [ABSTRACT FROM AUTHOR]

Published
2022
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2. Preconcentration of hydrogen selenide using hydride generation and purge-and-trap collection for the determination of selenium in water samples by atomic absorption spectrometry

Author

Masanori Nagao, Ikuo Ueta, and Daiki Kato

Subjects
inorganic chemicals, Health, Toxicology and Mutagenesis, Sodium, Inorganic chemistry, Soil Science, chemistry.chemical_element, 010501 environmental sciences, 01 natural sciences, Analytical Chemistry, law.invention, chemistry.chemical_compound, Ammonia, law, Selenide, Hydrogen selenide, Environmental Chemistry, Waste Management and Disposal, 0105 earth and related environmental sciences, Water Science and Technology, Aqueous solution, Hydride, 010401 analytical chemistry, Public Health, Environmental and Occupational Health, Pollution, 0104 chemical sciences, chemistry, Atomic absorption spectroscopy, Selenium
Abstract

Gaseous hydrogen selenide (H2Se) generated by the addition of sodium tetrahydroborate (NaBH4) into an acidic aqueous sample was collected using an aqueous ammonia solution. The selenium (Se) concen...

Published
2020

3. A Rapid, Routine Atomic Absorption Spectrometry Method for the Determination of Selenium at Sub-Microgram Levels in Animal Tissue

Author

Marshall Robbins Church and William H. Robison

Subjects
Time Factors, Health, Toxicology and Mutagenesis, Relative standard deviation, Analytical chemistry, Soil Science, chemistry.chemical_element, Combustion, Analytical Chemistry, law.invention, Selenium, chemistry.chemical_compound, law, Hydrogen selenide, Methods, Animals, Environmental Chemistry, Waste Management and Disposal, Water Science and Technology, Chromatography, Microchemistry, Spectrophotometry, Atomic, Fishes, Public Health, Environmental and Occupational Health, Pollution, Liver, chemistry, Evaluation Studies as Topic, Cattle, Atomic absorption spectroscopy
Abstract

A method is reported for determining selenium (Se) in animal tissue through Schoniger combustion, Se reduction to H2Se, and measurement by flame atomic absorption. The method provides several improvements over present hydrogen selenide generation apparatus and procedure. For the National Bureau of Standards Bovine Liver reference material containing 1.1±0.1 ppm Se, recovery averaged 100% with a relative standard deviation of 15 %. The minimum detecable quantity is 0.04 Ng Se. Data from the literature and results of analyses in our laboratory indicate that the method is adequately sensitive for tissue samples of almost any origin. Overall, our method is sensitive, precise, accurate, and simple and fast enough to use economically in routine monitoring of wildlife samples.

Published
1974

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