Department of Chemistry and Physics, Chaudhary Charan Singh Haryana Agricultural University, Hisar, Haryana.
Bull Environ Contam Toxicol. 2011 Aug;87(2):198-201. doi: 10.1007/s00128-011-0306-z. Epub 2011 May 20.
Residue levels of chlorpyriphos were determined in unprocessed and processed okra fruits to evaluate the effect of different processes (washing and washing followed by boiling/cooking) on reduction of residues of this pesticide in okra. The study was carried out on okra crop (Variety, Varsha Uphar) in research farm of Chaudhary Charan Singh, Haryana Agricultural University, Hisar with application of chlorpyriphos (Radar 20 EC) at 200 g a.i./ha and 400g a.i./ha (Single Dose, T(1)) and 400 g a.i./ha (Double Dose, T(2)). Samples of okra fruits were collected on 0, 1, 3, 5, 7, 10, 15 days and at harvest after treatment. Residues were estimated by GC-ECD system and reached BDL of 0.010 mg kg(-1) on 7th and 15th day in case of single and double dose, respectively. The residues dissipated with half-life period of 3.15 days at lower dose and 3.46 days at higher dose following biphasic first order kinetics. Processing was found very effective in reducing the levels of chlorpyriphos residues in okra fruits. Maximum reduction (64-77%) was observed by washing + boiling followed by washing (13-35%).
测定了未加工和加工的秋葵果实中氯吡硫磷的残留水平，以评估不同处理（清洗和清洗后煮沸/烹饪）对减少秋葵中这种农药残留的效果。该研究在恰尔恰尔·昌德·辛格哈里亚纳农业大学的研究农场进行，在秋葵作物（品种，Varsha Uphar）上应用氯吡硫磷（雷达 20 EC）200 g a.i./ha 和 400 g a.i./ha（单剂量，T(1))和 400 g a.i./ha（双剂量，T(2))。在处理后 0、1、3、5、7、10、15 天和收获时采集了秋葵果实的样本。用 GC-ECD 系统进行了残留量的测定，在单剂量和双剂量下，分别在第 7 天和第 15 天达到 BDL 为 0.010 mg kg(-1)。残留量以双相一级动力学半衰期为 3.15 天和 3.46 天的速度消散。处理被发现非常有效地降低了秋葵果实中氯吡硫磷残留的水平。经清洗+煮沸后再清洗（13-35%）的处理效果最佳，残留量降低了 64-77%。
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