Multiresidue analysis and monitoring of pesticides in rice by pressurized liquid extraction |
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Authors: | Takamitsu Otake Yoshie Aoyagi Takashi Yarita |
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Institution: | National Metrology Institute of Japan (NMIJ), National Institute of Advanced Industrial Science and Technology (AIST) , Umezono, Tsukuba, Ibaraki, Japan |
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Abstract: | The aim of this study was to assess the performance of a method of analyzing pesticides in rice by using pressurized liquid extraction (PLE) and to perform a preliminary monitoring by using that method. The instrumental quantification limit, instrumental detection limit, method quantification limit, and method detection limit were determined. PLE temperature was also optimized for 6 target pesticides. Mean recoveries of spiked rice with target pesticides (4 ng/g and 40 ng/g) were 83%–109% with the repeatability of the analysis, represented as relative standard deviations, ranged from 1.3% to 11% (n = 5) for PLE at 130°C. These results were satisfactory according to the method of positive list in Japan. In a preliminary analysis of 10 target pesticides in 54 commercial rice samples, ferimzone was detected in only one unpolished rice sample. |
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Keywords: | Pressurized liquid extraction pesticide analysis pesticide residue pesticide monitoring rice |
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