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퀘쳐스 전처리와 질량분석기를 이용한 유기농업자재 중 LC 대상 270 성분 농약 다성분 분석법 검증
박소희 ( Sohee Park ),박혜진 ( Hyejin Park ),임채욱 ( Chaiuk Lim ),유혜림 ( Hyerim Yu ),이한솔 ( Han Sol Lee ),백은주 ( Eun Joo Baek ),신병곤 ( Byeunggon Shin ),이성훈 ( Seong Hun Lee ),홍성희 ( Sung-hee Hong ) 한국환경농학회 2023 한국환경농학회 학술대회집 Vol.2023 No.0
Organic synthetic pesticides must not be detected in organic farming materials, so proper management must be preceded. This study was conducted to accurately and quickly analyze pesticide residues in organic farming materials. The simultaneous determination of 270 pesticides in organic farming materials was validated using the QuEChERS extraction and liquid chromatography-tandem mass spectrometry (LC-MS/MS). Organic farming materials with various properties such as co-extracts, oils were extracted with acetonitrile and QuEChERS EN buffer. And then, the organic farming materials were purified with the dispersive solid phase extraction (d-SPE, PSA) and detected by LC-MS/MS. To evaluate the validity of the method, recovery tests were performed on five types of organic farming materials at three spiking levels (0.05, 0.25, 0.5 mg/kg<sup>-1</sup>). The recoveries ranged between 70% and 120% with associated relative standard deviations(RSD) less than 22%. The limit of quantification (LOQ) of methods were below 0.05 mg/kg<sup>-1</sup>, and the coefficient of determination (R2) was more than 0.98 at matrix-matched calibration curves. Most of the compounds met the criteria. In order for the developed method to be certified as an analytical method determined by the head of NAQs, cross-validation of the three labs is in progress.
퀘쳐스 전처리와 질량분석기를 이용한 유기농 자재 중 259 성분 농약 다성분 분석법 검증
백은주 ( Eun Joo Baek ),박혜진 ( Hyejin Park ),임채욱 ( Chaiuk Lim ),유혜림 ( Hyerim Yu ),이한솔 ( Han Sol Lee ),박소희 ( Sohee Park ),신병곤 ( Byeunggon Shin ),이성훈 ( Seong Hun Lee ),홍성희 ( Sung-hee Hong ) 한국환경농학회 2023 한국환경농학회 학술대회집 Vol.2023 No.0
Organic farming materials are used to preserve the environment and grow agricultural products organically. In Korea, organic synthetic pesticides must not be detected in organic farming materials for soil amendments and biopesticides. So, proper management of the organic farming materials must be preceded. It is necessary to establish an analytical method to accurately and reliably analyze residual pesticides in organic farming materials with various properties such as extracts, oil, and so on. In this study, a QuEChERS method for simultaneous determination of 259 pesticide residues organic farming materials was validated. Organic farming material samples were extracted with acetonitrile and QuEChERS EN buffer.. And then targeted pesticides were purified with the dispersive solid phase extraction(d-SPE, PSA) and detected by gas chromatography-tandem mass spectrometry (GC-MS/MS). To evaluate performance of the method, validation experiments were carried out on five types of organic farming material at three spiking levels (0.05, 0.25, 0.5 mg kg<sup>-1</sup>). The recoveries of the organic farming materials ranged between 70 and 120.0% with associated relative standard deviations (RSD) less than 22% for most pesticides. The limit of quantification (LOQ) of methods were below 0.05 mg/kg<sup>-1</sup>, and the coefficient of determination (R<sup>2</sup>) of matrix-matched standards were > 0.98. In order for the developed method to be certified as an analytical method determined by the head of NAQs, cross-validation of the three labs is in progress.