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Liquid Chromatographic Determination of Simazine, Atrazine, and Propazine Residues in Catfish
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1995
Year
EngineeringPesticide-residue AnalysisLiquid Chromatographic DeterminationTriazine HerbicidesGas ChromatographyAquacultureAnalytical ChemistryToxicologyLiquid ChromatographyLc SeparationChromatographyWater QualityEcotoxicologyChromatographic AnalysisPharmacologyWater AnalysisLiquid ChromatographicPropazine ResiduesEnvironmental ToxicologyMedicineDrug Analysis
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.