A new monoclonal antibody with specificity for s-triazine herbicides was prepared using a tertbutyl-s-triazine hapten. An assay was developed, employing covalently immobilized hapten and monoclonal antibody labeled with horseradish peroxidase. This assay system had a detection limit of 0.01 w gl−1 cyanazine, with a coefficient of variation less than 3%. Analysis on three different spiked water types showed an average recovery of 101% at 0.1 w gl−1 cyanazine. Cross-reactions were found for atrazine, terbuthylazine and propazine in the range 18-62%. This immunoassay is therefore capable of detecting four different s-triazine herbicides at concentrations well below the limit value for drinking water of 0.1 w gl−1 stipulated by the EEC Council Directive on drinking water.
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Bruun et al. (2000) studied this question.
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