Development of enzyme immunoassays for the herbicide chlorsulfuron

Antibodies against the herbicide chlorsulfuron have been raised and characterized. Enzyme immunoassays (EIAs) for chlorsulfuron, involving labeled antigen or labeled antibodies, have been developed. The kinetics of antigen-antibody interactions in the EIA systems developed has been studied. Both systems exhibit equal sensitivity (1 ng/ml). The values of the coefficient of variation (CV), determined within the range of chlorsulfuron concentrations to be measured by the systems (1-100 ng/ml), are not in excess of 8%. The possibility of using glucose oxidase as a label in EIAs for chlorsulfuron has been demonstrated. Lack of cross-reactivity with a series of sulfonyl-/arylurea derivatives and triazines makes it possible to recommend the EIA systems developed for chlorsulfuron determination in the environment.