用大口径毛细管柱定量分析灭多威

Study on Quantitative Analysis of Methomyl by a Wide Bore Capillary Column

国外推荐灭多威的定量分析方法是高压液相色谱法,残留分析用气相色谱法,但需要将灭多威转化成甲基-N-羟基硫代乙酰亚胺酸酯,再进行定量分析。高压液相色谱仪,因其价格昂贵,普及程度远不如气相色谱仪。灭多威是当前国内大力开发的氨基甲酸酯杀虫剂,因此研究其分析方法,具有明显的实际意义。

The quantitative analytical method for Methomyl by a wide bore capillary column has been studied. The optimum gas chromatographic conditions were as follows. Column; fused silica, HP-1 (cross-linked methyl silicone) 10m × 0. 53mm × 2. 65μm film; column temperature: 130 ℃ ;injector: 200 C ;detector: 190℃ and carrier ;H2 26ml/min. Dimethyl phthalate was used as the internal standard. The analytical method for Methomyl gaves better accuracy and precision. However Methomyl decomposed when analyzed by gas chromatography using a packed glass column with 1. 83m × 2mm i. d. 3%OV-1 on 100/120 mesh Chromosorb W-HP.