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Copyright of Science & Technology of Food Industry is the property of Science & Technology of Food Industry Editorial Office 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 Journal of Food Safety & Quality is the property of Journal of Food Safety & Quality Editorial Department 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 Journal of Food Safety & Quality is the property of Journal of Food Safety & Quality Editorial Department 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 Journal of Food Safety & Quality is the property of Journal of Food Safety & Quality Editorial Department 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 Journal of Food Safety & Quality is the property of Journal of Food Safety & Quality Editorial Department 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 Journal of Food Safety & Quality is the property of Journal of Food Safety & Quality Editorial Department 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 Journal of Food Safety & Quality is the property of Journal of Food Safety & Quality Editorial Department 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.)

A rapid, simple and efficient analytical method for the determination of chlorantraniliprole in different primary grain and oilseed crops including brown rice, wheat, maize and soybean was developed and validated based on QuEChERS and high performance liquid chromatography-tandem mass spectrometry (HPLC-MS/MS). Chlorantraniliprole residues were extracted from primary grain and oilseed crops samples using acetonitrile-water with the addition of sodium chloride. After centrifugation, the upper solvent was cleaned-up by N-propylethyl-diamine (PSA) and graphitizing of carbon black (GCB), and determined by HPLC-MS/MS under multiple reaction monitoring mode (MRM). Sample matrix-matched calibrations were used to determine the residue contents by external standard. The calibration curves showed a good linearity in the concentration range of 0.005-0.5 mg/L for chlorantraniliprole in different sample matrix. The determination coefficients (R2) of the calibration curves were all above 0.99 and the limit of detection (LOD) was 0.001 mg/L. At fortification levels of 0.02, 0.05, 0.1 and 0.5 mg/kg in different primary grain and oilseed crop samples, recoveries ranged from 89% to 114% with relative standard deviation (RSD) of 1.3% to 11% (n = 5). The limit of quantification (LOQ) of chlorantraniliprole in brown rice, wheat, maize and soybean were all 0.02 mg/kg. This new method is applicable to detect the residues of chlorantraniliprole in different primary grain and oilseed crops. [ABSTRACT FROM AUTHOR]

An analytical method with high performance liquid chromatography-tandem mass spectrometry (HPLC-MS/MS) was established to test uniconazole residues in Gossypium spp. leaves, Gossypium spp. seeds and soil. Uniconazole residue and dissipation on Gossypium spp. leaves and soil were also investigated with this method. Uniconazole residues were extracted with acetonitrile/water mixture and an aliquot of the extract was purified by a solid-phase extraction Cleanert NH2 cartridge. Finally, the analytes were measured by multiple reaction monitoring (MRM) in the electrospray positive ionization mode. The external standard method was adopted for the quantification. The results showed that the recovery rate of uniconazole in Gossypium spp. leaves, Gossypium spp. seeds and soil were between 74%-101%, with the relative standard deviations from 1.2% to 10% (n = 5). The limits of detection (LOD) of the method were 0.01 ng and the limits of quantification (LOQ) were 0.01 mg/kg for three matrices. The method is accurate, sensitive, simple and suitable for the determination of uniconazole residues in Gossypium spp. samples. Field experimental results showed that the dissipation half-lives of uniconazole in Gossypium spp. leaves and soil were 4.2-5.0 days and 15.8-19.7 days, respectively. The terminal residues at harvest in Gossypium spp. seeds and soil were lower than 0.01 mg/kg and 0.022 mg/kg, respectively. [ABSTRACT FROM AUTHOR]