A multi-residue method for fast determination of pesticides in tea by ultra performance liquid chromatography-electrospray tandem mass spectrometry combined with modified QuEChERS sample preparation procedure

作者：Chen Guoqiang^*; Cao Pengying; Liu Renjiang

来源：Food Chemistry, 2011, 125(4): 1406-1411.

DOI：10.1016/j.foodchem.2010.10.017

• Pesticide
• Multi-residue
• Tea
• UPLC/MS/MS
• QuEChERS
• SPE

A multi-residue method was developed for rapid determination of pesticide residues in tea by ultra performance liquid chromatography-electrospray tandem mass spectrometry (UPLC/MS/MS) The QuEChERS method was used for sample preparation In order to minimise the matrix effects from tea a solid phase extraction (SPE) cartridge layered with graphite carbon/aminopropylsilanized silica gel was applied as complementary to QuEChERS method For accurate quantification representative matrix-matched calibration curves were applied to compensate matrix effects Limits of quantification varied with different pesticides but all can be measured at 0 01 mg kg(-1) level in a 5 g tea sample except dichlorvos (0 02 mg kg(-1)) Recoveries ranged from 70% to 120% and relative standard deviation (RSD) met the European Unit

• 出版日期2011-4-14