Multi-analytical method using LC/MSMS for pesticides from Meat (beef and pork) for monitoring was developed with QuEChERS preparation. After Sample weighing (5 g) in a 50 mL conical tube, ascorbic solution (0.5 mL) was added. 10 mL acetonitrile contained 1% acetic acid and QuEChERS extraction salt (AOAC method, 6 g MgSO4, 1 g CH3COONa) were added to the sample in the 50 mL conical tube. The mixture was strongly shaken for 10 min and was centrifuged at 3,000 g for 10 min. The acetonitrile layer was purification with dSPE (150 mg MgSO4, 25 mg C18) and was centrifuged at 13,000 g for 3 min. The supernatant was filtered with a membrane filters (pore size: 0.2 um) before analysis. <br/> ME (%, Matrix effect) for almost analytes range were -30.6 to 36.8%. MLOD (Method LOD) and MLOQ (Method LOQ) was calculated by S/N ratio. MLOQs were 0.01 mg/kg. The linear correlation coefficients (r2) were &gt; 0.99 within the range of 2 ~ 100 ug/kg for all of the 70 pesticides. The percentages (of 70 pesticides) recovers were in the range of 70.4 ~ 117.2%(0.01 mg/kg level) and 74.7 ~ 112.4%(0.1 mg/kg level) and 70.1 ~ 116.6%(0.5 mg/kg level) within the validation criteria (recover; 70-120% with RSD &lt; 20%)

Multi-analytical method of pesticides from meat using LC/MSMS

Macromolecular Chemistry: The Second Century

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ACS Spring 2020 National Meeting & Expo

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