A multiresidue method for the determination of 118 pesticides in vegetable juice by gas chromatography-mass spectrometry and liquid chromatography-tandem mass spectrometry.
An analytical method has been developed for measuring 118 pesticides in vegetable juice. The extraction of pesticides was carried out based on dispersive solid-phase extraction, and determination was performed using gas chromatography with mass spectrometric detection (GC-MS-SIM) and liquid chromatography electrospray ionization tandem mass spectrometry (LC/ESI-MS/MS). Pesticides were confirmed by their retention time and their quantification and identification ions by GC-MS-SIM or multiple reaction monitoring of two fragment ions by LC/ESI-MS/MS, respectively. Spiking experiments from 10 to 120 microg/kg were carried out to determine the recovery, precision, and limit of quantification (LOQ) of the method. The overall recoveries of all pesticides were between 77 and 114% with relative standard deviations lower than 14%. The LOQ for most compounds was below 5 microg/kg. The proposed method was applied successfully for the residue determination of the 118 pesticides in commercial vegetable juice samples.
Department of Chemistry, Chungnam National University, 220, Gung-dong, Yuseong-gu, Daejeon, South Korea 305-764.
Thanh Dong
TD
Nguyen
Mi Young
MY
Yun
Gae-Ho
GH
Lee
D001628:Beverages / Q000032:analysis*; D002853:Chromatography, Liquid / Q000379:methods*; D008401:Gas Chromatography-Mass Spectrometry / Q000379:methods*; D010573:Pesticide Residues / Q000032:analysis; D053719:Tandem Mass Spectrometry / Q000379:methods*; D014675:Vegetables / Q000737:chemistry*
D010573:Pesticide Residues