DETERMINATION OF O-PHENYLPHENOL, DIPHENYLAMINE, AND PROPARGITE PESTICIDE-RESIDUES IN SELECTED FRUITS AND VEGETABLES BY GAS-CHROMATOGRAPHY MASS-SPECTROMETRY

A simple and rapid method was developed to detect o-phenylphenol, diph enylamine, and propargite in selected fruits and vegetables. Gas chrom atography/mass spectrometry in the selective-ion monitoring mode was u sed to identify and quantitate the 3 residues. Residues were extracted with acetonitrile and transferred to acetone. Limits of detection wer e 10, 8, and 15 ppb for o-phenylphenol, diphenylamine, and propargite, respectively. Recovery data were obtained by fortifying 4 matrixes (a pples, oranges, canned peaches, and spinach) at 0.025-0.888 ppm. The m ethod provides very good linearity data with low coefficients of varia tion.