Determination of seventeen pesticide residues in agricultural products by LC/MS.
Residues of 17 pesticides in agricultural products were determined by LC/MS with an atmospheric pressure chemical ionization (APCI) interface in both positive and negative ion modes. Pesticides were extracted with acetonitrile, and the extracts were cleaned-up with a primary and secondary amine (PSA) mini-column eluted with acetone-hexane (1:1). Rice, orange and potato were spiked with the 17 pesticides at 0.1 microgram/g and analyzed by the proposed method. The average recoveries of these pesticides usually ranged from 70 to 98% and the relative standard deviations were usually around 10%. These results suggested that LC/MS with APCI could be used to determine the residue levels of the 17 pesticides in these crops.
Okihashi
Masahiro
M
Osaka Prefectural Institute of Public Health: 1-3-69, Nakamichi, Higashinari-ku, Osaka 537-0025, Japan.
Kitagawa
Yoko
Y
Akutsu
Kazuhiko
K
Obana
Hirotaka
H
Hori
Shinjiro
S
D018556:Crops, Agricultural / Q000737:chemistry*; D008401:Gas Chromatography-Mass Spectrometry / Q000379:methods*; D010573:Pesticide Residues / Q000032:analysis*
D010573:Pesticide Residues