Quantitative analysis of phoxim and cypermethrin using wide bore capillary column gas chromatography]
辛硫磷和氯氰菊酯的大口径毛细管气相色谱定量分析研究

A compound pesticide, 20% P-C emulsion, consisting of 18.5% phoxim and 1.5% cypermethrin pesticides and other accessory agents is especially effective in controlling and killing boll worms. For its quality control some difficulties were encountered. In this paper we propose a simple and practical method for GC analysis of the product by use of a short wide bore capillary column (HP-1, 5m x 0.53mm x 2.65microm), high carrier gas flow rate and high-speed temperature programming etc.. Content analysis of efficient composition of "20% P-C emulsion" was completed under the chromatographic conditions using methyl parathion as an internal standard. Coefficient of variation of phoxim and cypermethrin were 0.67% and 1.0% respectively.