中文摘要：

通常使用高效液相色谱法检测农药中有效成分吡虫啉的含量。文章采用红外光谱法直接测定农药中吡虫啉含量，样品使用KBr压片法。吡虫啉标准品和商品吡虫啉农药的红外光谱对照实验表明：吡虫啉在939．2cm^-1处的吸收峰不受农药中其他成分的干扰，可以选择此峰为定量分析波数；吡虫啉红外光谱在947～925．8cm^-1处的峰面积与其净含量满足线性方程：Area=1．3665×10^-1＋2．37×10^-2×c，相关系数r=0．99953。结论：利用红外光谱快速检测农药中有效成分吡虫啉含量的方法是可行的，可以替代常规的理化分析，能够满足快速分析的需要。

英文摘要：

The content of imidacloprid in pesticide is usually measured by high-performance liquid chromatography, which is precise but time-consuming. In the present work the content of imidacloprid in pesticide was measured by infrared spectroscopy with pressing potassium bromide troche（KBr）. A comparison of infrared spectra between analytic imidacloprid and commercial pesticide showed that the absorption peak of imidacloprid at 939.2 cm^-1 is independent and can be used as the characteristic absorption peak for quantitative determination. The area from 947 to 925.8 cm^-1 for the infrared spectra of irnidacloprid and its content meet the linear equation： Area=1. 366 5×10^-1＋2. 37×10^-2 ×c, r=0. 999 53. Finally, the authors could draw a conclusion that the method of NIR, instead of routine lab analysis, is feasible for the determination of imidacloprid in pesticide.