Determination of organic phosphorus pesticide in environmental water by flow injection-spectrophotometry

Abstract

An automatic, convenient method combined flow injection technique for determining organic phosphorus pesticide in environment water was developed based on the inhibition effects of organic phosphorus pesticide to plant-esterase. The optimized determining conditions were acquired, and the analytical characteristics of this method were studied. The linear ranges of dichlorvos' standard curves was 0.008 ∼ 4mg/L. The linear equation of dichlorvos was U(mV) = −4874.4 C (mg/L) + 110313. The correlation coefficient of dichlorvos was 0.9984. The detection limit (S/N= 3) was 0.02mg/L for dichlorvos. The relative standard deviation (RSD) of dichlorvos was 1.04% (n=6). The recoveries ranged from 95% to 105%. The analysis result was good.