Multiresidue liquid chromatographic method for simultaneous determination of pyrethroid insecticides in fruits and vegetables.
A simple and rapid liquid chromatographic (LC) method has been developed for simultaneous determination of 9 pyrethroid insecticides (biphenthrin, cypermethrin, fenpropathrin, fenvalerate, flucythrinate, methothrin, permethrin, py-115, and tetramethrin) in fruits and vegetables. Residues are extracted from crops with methanol and partitioned with toluene. Extracts are cleaned up by Florisil-charcoal column chromatography. LC separation is performed on a muBondapak C18 stainless steel column with acetonitrile-deionized water as mobile phase. The insecticides are detected at 206 nm with 0.03 absorbance unit full scale. Recoveries of 9 pyrethroid insecticides from 6 crops (cucumbers, tomatoes, cabbages, apples, pears, and peaches) fortified at 0.5-5.0 mg/kg were 62.7-129.2%. Detection limits were about 0.05 mg/kg, except for py-115, for which detection limit was 0.10 mg/kg.
Pang
G F
GF
Qin Huangdao Import and Export Commodity Inspection Bureau, Hebei, People's Republic of China.
Chao
Y Z
YZ
Liu
X S
XS
Fan
C L
CL
D002853:Chromatography, Liquid / Q000379:methods*; D005504:Food Analysis; D005506:Food Contamination; D005638:Fruit / Q000737:chemistry; D007306:Insecticides / Q000032:analysis*; D010573:Pesticide Residues / Q000032:analysis*; D011722:Pyrethrins / Q000032:analysis*; D014675:Vegetables / Q000737:chemistry
D007306:Insecticides; D010573:Pesticide Residues; D011722:Pyrethrins