Development and Validation of GC/MS Screening Method for Pesticides in Drinking Water

KINOSHITA Teruaki, ODA Tomoko, KURITA Shou, YAMAZAKI Takako, INOMATA Akiko, SAKUI Norihiro, NOHARA Kenta, NAKAMURA Sumomo, TSUCHIYA Yuko, KOBAYASHI Norihiro

doi:10.11353/sesj.37.53

<p>A screening analysis database of 168 pesticides in drinking water for gas chromatography-mass spectrometry (GC/MS) analysis was developed using an Agilent GC/MS system. The qualitative and quantitative accuracy was evaluated using standard solutions and river water samples. One month after the database was developed, the screening analysis was conducted again for each pesticide using 0.05 mg/L standard solution. As a result, 162 of the 168 pesticides registered in the database were identified. On the other hand, there were some pesticides that should be carefully identified. In order to compare the test results of the screening analysis and standard analysis methods, both methods were applied to river water samples at five sites in the Tamagawa River basin. The results showed that all pesticides detected by both methods were the same, even though they were conducted by different inspectors. The concentration ratio between the screening analysis and standard analysis ranged from 0.63 to 0.98, indicating that the quantitative error of the screening analysis method was within one-half to two times of the standard analysis. In conclusion the screening analysis method developed in this study is useful in the testing of pesticides in drinking water samples.</p>

Development and Validation of GC/MS Screening Method for Pesticides in Drinking Water

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