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本文报道1985年在南京和北京两地进行的托尔克农药在番茄上残留动态的研究和分析方法。18块试验地的用药量为每亩20克和40克(每公顷300克和600克)50％可湿性粉剂。定期定株采集番茄样品,用二氮甲炕提取,浓盐酸处理,柱层析净化,气相色谱检测托尔克的氯化物。色谱条件为2％OV-17Chroln Q分离柱,柱温240℃,载气(高纯氮)流速60ml/min,电子捕获检测。试验结果:平均回收率为99.5％;托尔克农药的半衰期为17天左右;按照推荐用药量,喷药后一个月,托尔克在番茄上的残留量低于0.1ppm。
This paper reports on the methods of research and analysis on the residue dynamics of Tolcan pesticides on tomato in Nanjing and Beijing in 1985. The dosage for the 18 plots was 20 grams per mu and 40 grams (300 grams and 600 grams per hectare) of 50% wettable powder. Routinely collected samples of tomato plants, extracted with diazepam, concentrated hydrochloric acid, column chromatography purification, gas chromatography detection of Torque chloride. Chromatographic conditions were 2% OV-17 Chroln Q column with a column temperature of 240 ° C and a carrier gas (high purity nitrogen) flow rate of 60 ml / min. Electron capture detection. Test results: The average recovery was 99.5%; Torque pesticide half-life of about 17 days; according to the recommended dosage, one month after spraying, Torque residues in tomatoes less than 0.1ppm.