百菌清含量测定的气相色谱分析

摘要

Objective: To establish a method for the determination of chlorothalonil. Methods: Gas chromatography. Internal standard was O-terphenyl, 5%OV-17 + 1.1%OV-225 /chromosorb WAW-DMCS (150um)Stainless steel column ( 2.0m í3mm)at 185℃, temperature ofaerification room: 280℃,temperature of FID for detector: 280℃, Carries gas:helium. Results: A good linearity obtained over the range of 0.120-12.0mg/mL mg/mL (R2=0.9993)to the concentration of chlorothalonil,thestandard deviation was 0.11%, the variation coefficient of chlorothalonil was 0.11%, the range of average recoveries was 99.6-100.1%, Good Stability. Conclusion: This method is accurate, sensitive and applicable for the determination of chlorothalonil.%目的：建立了原药百菌清含量测定的方法。方法：气相色谱法。内标物为邻二苯基苯，色谱柱为5%OV-17+1.1%OV-225/chromosorb WAW-DMCS（150 um）不锈钢填充柱（2.0m伊3mm（内径）），柱温：185益，气化室温度：280益，FID检测器温度：280益，载气为氮气。结果：百菌清浓度在0.120-12.0mg/mL范围内呈良好的线性关系（R2=0.9993），标准偏差为0.11%，回收率在99.6-100.1%，稳定性好。结论：本方法操作简便、快速、准确，可作为百菌清含量的测定方法。