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Trace-Level Determination Of Hydroxyatrazine And Dealkylated Degradation Products Of Atrazine In Waters

1993; Taylor & Francis; Volume: 52; Issue: 1-4 Linguagem: Inglês

10.1080/03067319308042852

1029-0397

V. Coquart, P. García-Camacho, M.-C. Hennion,

Electrochemical Analysis and Applications

Abstract Dealkylated degradation products of atrazine, dealkyl- and deisopropyl-atrazine have been now detected in environmental waters, but determination of hydroxyatrazine has not been reported just because this product is not amenable to GC-MS. An analytical procedure has been developed for the simultaneous trace-level determination of some widely used chorotriazines and of three main degradation products, deisopropyl-, deethyl- and hydroxyatrazine, using a selective solid-phase-extraction coupled on-line to liquid chromatography. The preconcentration has been carried out with two precolumns in series. The first one, packed with the PRP-1 sorbent allowed the preconcentration of hydroxyatrazine and other metabolites. Analytes of interest were then desorbed from the PRP-1 precolumn in their ionic form and transferred to a second precolumn packed with a cation exchanger, which was afterwards coupled on-line to an analytical C18 column. The use of the selective cation-exchanger sorbent for the preconcentration and of the on-line HPLC analysis led to detection limits as low as 2–5 ng/l in samples from the river Seine, without any clean-up procedure. Key Words: Hydroxyatrazinedeethylatrazinedeisopropylatrazineon-line preconcentrationHPLC.