An enzyme-linked immunosorbent assay (ELISA) was compared to a gas chromatography/mass spectrometry (GC/MS) procedure for the analysis of triazine herbicides and their metabolites in surface water and groundwater. Apparent recoveries from natural water and spiked water by both methods were comparable at 0.2-2 micrograms/L. Solid-phase extraction (SPE) was examined also, and recoveries were determined for a suite of triazine herbicides. A significant correlation was obtained between the ELISA and GC/MS method for natural water samples that were extracted by SPE. Because ELISA was developed with an atrazine-like compound as the hapten with conjugation at the 2-position, it was selective for triazines that contained both ethyl and isopropyl side chains. Concentrations for 50% inhibition (IC50) were as follows: atrazine, 0.4 microgram/L; ametryne, 0.45 microgram/L; prometryn and propazine, 0.5 microgram/L; prometon, 0.7 microgram/L; simazine and terbutryn, 2.5 micrograms/L; hydroxyatrazine, 28 micrograms/L; deethylatrazine and deisopropylatrazine, 30 micrograms/L; cyanazine, 40 micrograms/L; didealkylatrazine had no response. The combination of screening analysis by ELISA, which requires no sample preparation and works on 160 microL of sample, and confirmation by GC/MS was designed for rapid, inexpensive analysis of triazine herbicides in water.

Enzyme-linked immunosorbent assay compared with gas chromatography/mass spectrometry for the determination of triazine herbicides in water.

High-performance separations in the determination of triazine herbicides and their residues

Potentiometric sensor for atrazine based on a molecular imprinted membrane.

Micellar electrokinetic capillary chromatography of neutral solutes with micelles of adjustable surface charge density

High-performance liquid chromatography of s-triazines and their degradation products using ultraviolet photometric and amperometric detection

The behaviour of 19 s-triazine derivatives was studied using high performance liquid chromatography. The effect of the composition and pH of the mobile phase on the retention data was studied on the CN-bonded stationary phase. The dependences among the s-triazine structure, the dissociation constants and the chromatographic data are discussed.

E. SmolkováJr.

Papers

Liquid chromatographic separation and behaviour of some substituted s-triazines on a CN-bonded stationary phase