PAN Yong-bo,ZHAO Jing,WAN Na,LIU Chun-hua,LI Chun-li.Determination of 90 Pesticide and Their Metabolites Residues in Coconut Meat Juice by Modified QuEChERS/LC-MS/MS Method[J].Journal of Instrumental Analysis,2025,44(07):1338-1345.
PAN Yong-bo,ZHAO Jing,WAN Na,LIU Chun-hua,LI Chun-li.Determination of 90 Pesticide and Their Metabolites Residues in Coconut Meat Juice by Modified QuEChERS/LC-MS/MS Method[J].Journal of Instrumental Analysis,2025,44(07):1338-1345. DOI: 10.12452/j.fxcsxb.241121550.
Determination of 90 Pesticide and Their Metabolites Residues in Coconut Meat Juice by Modified QuEChERS/LC-MS/MS Method
A method for the determination of 90 pesticides and their metabolites residues in coconut m
eat juice was established by liquid chromatography-tandem mass spectrometry(LC-MS/MS). The coconut meat juice samples were extracted with 1% formic acid acetonitrile,purified by dispersive solid phase extraction columns containing N-propylethylenediamine(PSA),lipid and protein adsorbent (LPAS),Florisil and aminated-multi-walled carbon nanotubes(NH
2
-MWCNTs) purification materials,analyzed by multi-reaction monitoring (MRM) mode,and quantified by external standard method of matrix-matched standard curve. The results showed that the 90 pesticides and their metabolites showed good linearity in the range of 0.002-0.2 mg/L with the correlation coefficients(
r
2
) more than 0.99,and the limit of quantification(LOQ) was 0.01 mg/kg. Average recoveries at three spiked levels were 60.6%-118% with relative standard deviations(RSDs) of 0.60%-12% (
n=
6). This method has good purification effect and simple operation. It is suitable for the determination of various pesticide residues in coconut meat juice.
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