16916

Dissipation Kinetics of Benthiocarb in Water at Different pH levels under Laboratory Condition.

71

74

4

Laboratory degradation studies were performed in water at pH 4.0, 7.0 and 9.2 using Benthiocarb (Saturn 50 EC) formulation at the rates of 1.0 (T1) and 2.0 (T2) (mu)g/mL. Water samples collected on 0 (2h),3,7, 15,30,45,60 and 90 days after treatments were processed for residue analysis of benthiocarb by GC-NPD capillary system. In 60 days, dissipation was 92.82-93.81% at pH 4.0, 89.12-90.63% at pH7.0, and 92.67-93.88% at pH 9.2 in both treatments showing very little effect of pH on dissipation. The half-life periods observed were 15.13 and 16.01 days at pH 4.0 , 17.92 and 18.81 days at pH 7.0 and 11.32 and 12.54 days at pH 9.2 at T1 and T2 doses respectively. Dissipation followed a triphasic first order kinetics in water at all the three pH levels.

1200819