Determination of Trace Atrazine and Its Environmental Degradation Products by Solid Phase Extraction and Liquid Chromatography/Mass Spectrometry
This paper describes a sensitive and specific method for trace determination of atrazine and its main degradation products (DPS); deethylatrazine (DEA), deisopropylatrazine (DIA hydroxyatrazine (HA), deethyldeisopropylatrazine (DEDIA) in environmental water. A chemically modified'polymeric resin (sulfonated divinylbenzene -N-vinylpyrrolidone copolymer) for solid phase extraction (SPE) was applied to extract the trace analytes in environmental water followed by liquid chromatography-atmospheric pressure chemical ionization (APCI)/massspectrometry (MS). This sulfonated modified copolymer has high selectivity for atrazine and its Us, and the breakthrough experiments show that the atrazine. and three, Us, ( DEA, DIA, HA) have high sorption capacity except DEDIA. On extracting from 500 mL water with concentration of 50 ng/L, recoveries of the analytes were better than 80% with relative standard deviations lower than 7%., The analyte was detected in selected ion monitoring (SIM) mode using APCI-MS. Time-scheduled SIM of the molecular ion (cone 14 V) could be performed down to 10 similar to 20 ng/L levels. Some environmental surface water, has been analyzed in practice.