Abstract: The method for simultaneous determination of 14 kinds of pesticide residues in Kaite mango was developed by QuEChERS with ultra-performance liquid chromatography-triple quadrupole mass spectrometry (UPLC-MS/MS). Ten grams samples were pretreated with an improved QuEChERS method, and then the target analytes were separated on a ZORBAX SB-C18 column with gradient elution using a mobile phase made up of 4mmol/L formic acid solution and methanol. Positive ion of electrospray ionization (ESI) and multiplereaction monitoring (MRM) mode were adopted in MS analysis. The concentration of 14 pesticides showed good linearity in the range of 4.0～200.0 μg/L (r＞0.999). The detection limits between 0.15 and 1.0 μg/kg, respectively. The spiked recovery rates were in the range of 86.5%～103.1%. The relative standard deviation (RSD) was 4.1%～11.5%. This method could meet the requirements for the determination of 14 kinds of pesticide residues in kaite mango.
ANASTASSIADES M, LEHHOTAY S J, STAJNBAHER D, et al. Fast and easy multiresidue method employing acetonitrile extraction/partitioning and “dispersive solid-phase extraction” for the determination of pesticide residues in produce[J]. Journal of Aoac International, 2003, 86(2): 412-431.