AINP on Pesticide Residues, College of Agriculture, Kerala Agricultural University, Vellayani PO, Trivandrum 695 522, India.
Environ Monit Assess. 2013 Jun;185(6):5277-84. doi: 10.1007/s10661-012-2943-z. Epub 2012 Oct 19.
The dissipation kinetics and method for estimation of residues of chlorpyrifos and lambda-cyhalothrin in cardamom were studied and developed. The limit of detection and limit of quantitation arrived for the compounds were 0.01 and 0.025 μg g(-1), respectively. Gas chromatographic response of chlorpyrifos and lambda-cyhalothrin residues was linear in the range of 0.01-0.50 μg g(-1) and the mean recovery obtained was 97.3 % for chlorpyrifos and 98.9 % for lambda-cyhalothrin with satisfactory relative standard deviation values. The mean initial residues of chlorpyrifos applied at a concentration of 0.05 % in cardamom was 2.5 μg g(-1) and the residue was 8.1 μg g(-1) after processing, with a processing factor of 3.24, while lambda-cyhalothrin when applied at 0.0025 % resulted in initial residues of 1.63 μg g(-1) that magnified to 4.86 μg g(-1) on curing, with a processing factor of 2.98. The half-life of chlorpyrifos was in the range of 5.1-5.24 days while that of lambda-cyhalothrin was in the range of 4.40-4.55 days. The processing factor arrived at in the above experiment lead to the conclusion that the residues of chlorpyrifos got magnified to 3.24-3.68 times and that of lambda-cyhalothrin got magnified to 2.98-3.46 times of initial residues, consequent to loss of weight due to dehydration during curing.
对小豆蔻中氯吡硫磷和氯氰菊酯残留的消解动态和残留量估计方法进行了研究和开发。该化合物的检测限和定量限分别为 0.01 和 0.025μg g(-1)。氯吡硫磷和氯氰菊酯残留的气相色谱响应在 0.01-0.50μg g(-1)范围内呈线性，氯吡硫磷的平均回收率为 97.3%，氯氰菊酯的平均回收率为 98.9%，相对标准偏差值令人满意。在小豆蔻中以 0.05%的浓度施用氯吡硫磷的初始残留量为 2.5μg g(-1)，加工后的残留量为 8.1μg g(-1)，加工因子为 3.24，而以 0.0025%的浓度施用氯氰菊酯的初始残留量为 1.63μg g(-1)，在加工后放大到 4.86μg g(-1)，加工因子为 2.98。氯吡硫磷的半衰期在 5.1-5.24 天之间，而氯氰菊酯的半衰期在 4.40-4.55 天之间。上述实验得出的加工因子表明，由于加工过程中脱水导致重量损失，氯吡硫磷的残留量放大了 3.24-3.68 倍，氯氰菊酯的残留量放大了 2.98-3.46 倍。
