Liquid chromatographic determination of simazine, atrazine, and propazine residues in catfish
Holland, D.C.; Munns, R.K.; Roybal, J.E.; Hurlbut, J.A.; Long, A.R.
Journal - Association of Official Analytical Chemists 78(4): 1067-1071
1995
ISSN/ISBN: 0004-5756 PMID: 7580319 Document Number: 444355
A liquid chromatographic (LC) method is described for the simultaneous determination of the triazine herbicides, simazine (SIM), atrazine (ATZ), and propazine (PRO) in the 12.5-100 ppb range in catfish. The herbicides are extracted from catfish homogenates with ethyl acetate, followed by solvent partitioning between acetonitrile and petroleum ether and additional cleanup on a C18 cartridge. A Supelcosil LC-18-DB column is used for LC separation, and UV determination is at 220 nm. The isocratic mobile phase is a mixture of methanol, acetonitrile, and water. Mean recoveries from catfish were 88.7, 96.9, and 91.7%; standard deviations were 6.84, 7.78, and 6.26%; and coefficients of variation were 7.72, 8.03, and 6.82% for SIM, ATZ, and PRO, respectively.