FOOD SCIENCE ›› 2011, Vol. 32 ›› Issue (18): 268-273.doi: 10.7506/spkx1002-6630-201118060

• Analysis & Detection • Previous Articles     Next Articles

Rapid Determination of 50 Pesticide Residues in Citrus by QuEChERS-Gas Chromatography-Mass Spectrometry

HUANG Xia1,2，SONG Ying2,3，ZHANG Yao-hai2，LI Yun-cheng1,2，JIAO Bi-ning1,2,*   

  1. (1. College of Food Science, Southwest University, Chongqing 400716, China； 2. Citrus Research Institute, Chinese Academy of Agricultural Sciences, Southwest University, Chongqing 400712, China； 3. Institute of Agro-Food Sciences and Technology, Chinese Academy of Agricultural Sciences, Beijing 100193, China)
  • Online:2011-09-25 Published:2011-09-24

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Abstract: An analytical method for the rapid determination of 50 pesticides residues in citrus by gas chromatography-mass spectrometry (GC-MS) with QuEChERS was established in a selected ion-monitoring (SIM) mode. The pesticide residues in samples were extracted into acetonitrile and salted out by anhydrous MgSO4 and NaCl. Then, the pesticide residues in the supernatant after clean-up on N-propyl ethylenediamine (PSA) cartridge were subjected to GC-MS analysis. Under the optimal conditions, the limits of detection (RSN ＝ 3) of the established method were in the range of 0.0038－0.066 mg/kg, and the average recovery rates (ｎ＝6) for 50 pesticide residues in a blank sample were 72.0%－118.2% with a relative standard deviations (RSDs) of 1.7%－19.7%.

Key words: citrus, QuEchERS, gas chromatography-mass spectrometry (GC-MS), multiple pesticide residue analysis

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