Surface water is contaminated by various xenobiotics. Using standardized methods, the content of organochlorine pesticides that are environmentally stable, migrate along food chains and can accumulate in dangerous amounts in living organisms is monitored. In this case, the insecticide imidacloprid is not controlled, however, its ingress into surface and ground waters is not allowed. Seasonal detection of imidacloprid in fish tissues may indicate a violation of regulations for working with imidacloprid preparations. To ensure the necessary preventive regulation and to protect surface water from imidacloprid contamination, a methodology is needed for laboratory monitoring of the general sanitary level of imidacloprid in surface waters. In this work, imidacloprid extracts were obtained based on the liquid-liquid extraction method, the optimal conditions for the quantitative analysis of imidacloprid were determined using high-performance liquid chromatography with a spectrophotometric (diode array detector) detector (HPLC/DAD). The limit of detection of the imidacloprid, which was reached in the work, is 0.15 µg/mL, the limit of quantification is 0.7 µg/mL. Taking into account preliminary concentration (100 times), the lower limit of imidacloprid detection in water is 0.0015 mg/L, the range of determined contents is 0.007–0.028 mg/L. The developed method is simple to perform, allows us to measure the imidacloprid content in one water sample by 90 minutes. The method can be used for monitoring studies of the imidacloprid content in surface water, to collect the water pollution data and forecast its impact.

中文翻译：

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地表水中异生物吡虫啉含量的测定

地表水被各种异生素污染。使用标准化方法，可以监测环境稳定，沿食物链迁移并可能以危险量在生物体内积累的有机氯农药的含量。在这种情况下，杀虫剂吡虫啉是不受控制的，但是不允许其进入地表水和地下水。在鱼类组织中季节性检测吡虫啉可能表明违反了使用吡虫啉制剂的规定。为了确保必要的预防性法规并保护地表水免受吡虫啉的污染，需要一种方法来实验室监测地表水中吡虫啉的一般卫生水平。在这项工作中，吡虫啉提取物是根据液-液提取方法获得的，使用高效液相色谱和分光光度法（二极管阵列检测器）检测器（HPLC / DAD）确定吡虫啉定量分析的最佳条件。在工作中达到的吡虫啉的检出限为0.15 µg / mL，定量限为0.7 µg / mL。考虑到初步浓度（100倍），水中吡虫啉检测的下限为0.0015 mg / L，测定的含量范围为0.007–0.028 mg / L。所开发的方法易于执行，可让我们在90分钟内测量一个水样中吡虫啉的含量。该方法可用于监测地表水中吡虫啉含量，以收集水污染数据并预测其影响。