[Determination of cyflufenamid residue in carrots by gas chromatography-negative chemical ionization mass spectrometry].
A method was developed for the determination of cyflufenamid residue in carrots by solid phase extraction-gas chromatography-negative chemical ionization mass spectrometry (SPE-GC-NCI/MS). Cyflufenamid residue was extracted with ethyl acetate from carrots. The extract was cleaned-up by an active carbon SPE column connected to a neutral alumina SPE column. The analysis was carried out by the GC-NCI/MS with selected ion monitoring mode. The recoveries of cyflufenamid in carrot samples were in the range from 74.9% to 94.6% at four spiked levels, 0.005, 0.01, 0.02, 0.04 mg/kg, and the relative standard deviations (RSD) were less than 9.7% for inter-days. The linearity of the method was good in the range from 10 to 1000 ng/mL, and the limit of detection (LOD) was 0.001 mg/kg, and the limit of quantitation (LOQ) was 0.005 mg/kg. The method is selective without interference and is suitable for the determination and confirmation of cyflufenamid residue in carrots.
Yang
Wenquan
W
Laboratory of Food, Jiangsu Entry-Exit Inspection and Quarantine Bureau, Nanjing 210001, China. xiaoquan025@163.com
Shen
Weijian
W
Zhao
Zengyun
Z
Xu
Jinzhong
J
Shen
Chongyu
C
Wu
Bin
B
D002138:Calibration; D018552:Daucus carota / Q000737:chemistry*; D005504:Food Analysis / Q000379:methods*; D005506:Food Contamination / Q000032:analysis*; D008401:Gas Chromatography-Mass Spectrometry / Q000379:methods*; D057230:Limit of Detection; D016014:Linear Models; D010573:Pesticide Residues / Q000032:analysis*
D010573:Pesticide Residues