Abstract This research is a case study on detection of pesticides in river water, sediment as well as fish samples from Tapi River, among the major rivers of Gujarat, India. To investigate the misuse, concentration level and occurrence patterns of persistent pesticides, samples were collected from the river. Chlorpyrifos, methyl parathion, hexachlorocyclohexane (HCH), dichloro diphenyl trichloroethane (DDT) and endosulfan were analyzed by gas chromatography technique with flame ionization detector (FID). Scanty reports are available, but after 1999, no such data are reported as some of these pesticides have been banned. Although these pesticides are still in use which we observed from the obtained results. In this river, the amount of endosulfan, chlorpyrifos, and methyl parathion was observed in surface water with concentrations of 37.56 µg/L, 0.86 µg/L and 0.43 µg/L, respectively. Endosulfan, DDT and methyl parathion detected in sediment were 38.38 ng/g, 0.65 ng/g and 0.77 ng/g, respectively. In fish samples, levels of endosulfan, chlorpyrifos, and methyl parathion detected were 101.28, 0.392, and 3.49 ng/g correspondingly. Results showed that highly toxic pesticides are still being used in the surrounding area, and there is an urgent need for enforcement of rules to control the production and application of such pesticides.

中文翻译：

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以印度塔皮河水体、沉积物和鱼类样本中农药残留调查为例及其法医学意义

摘要 本研究是印度古吉拉特邦主要河流塔皮河河水、沉积物和鱼类样本中农药检测的案例研究。为了调查持久性农药的误用、浓度水平和发生模式，从河流中采集了样品。毒死蜱、甲基对硫磷、六氯环己烷 (HCH)、二氯二苯基三氯乙烷 (DDT) 和硫丹通过气相色谱技术和火焰离子化检测器 (FID) 进行分析。可用的报告很少，但在 1999 年之后，由于其中一些农药已被禁用，因此没有此类数据报告。虽然这些农药仍在使用中，但我们从获得的结果中观察到。在这条河流中，在地表水中观察到硫丹、毒死蜱和甲基对硫磷的含量为 37.56 µg/L，0. 分别为 86 µg/L 和 0.43 µg/L。在沉积物中检测到的硫丹、滴滴涕和甲基对硫磷分别为 38.38 ng/g、0.65 ng/g 和 0.77 ng/g。在鱼类样本中，检测到的硫丹、毒死蜱和甲基对硫磷的含量分别为 101.28、0.392 和 3.49 ng/g。结果表明，周边地区仍在使用剧毒农药，迫切需要执行法规来控制此类农药的生产和使用。