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分析方法(一)薄层分析:薄层色层分离方法是近年来发展起来的分离多组分混合物的一个简便和有效的方法。它具有分离速度快,灵敏度高,能分析微量物质等优点。我们用它来作为乙氧滴滴涕的定性分析。1.制板:首先在一块5×15cm 的玻璃板上涂上固定相——硅胶 G,经过涂布,活化后制成薄层板,即硅胶 G 硬板备用。2.点样:样品用氯仿溶解,制成1～2%的溶液,用微量注射器把样品点在直径为3mm 的园形滤纸上,每次6微升,待滤纸上样品的溶剂吹干后,把它移到事先准备好的硅胶板上,滤纸距离簿层板一端约1.5cm 处。用同样的方法在距欲测样品旁边约
Analysis methods (A) thin layer analysis: thin layer chromatography method is developed in recent years, the separation of multicomponent mixture is a simple and effective method. It has the advantages of fast separation, high sensitivity, capable of analyzing trace substances. We use it as a qualitative analysis of ethoxychlor DDT. 1. System board: First, a 5 × 15cm glass plate coated with a stationary phase - silica gel G, after coating, made of thin activated layer, that is, silicone G hard board spare. 2. Spotting: The sample is dissolved in chloroform to make a solution of 1 to 2%. The sample is spotted on a circular filter paper with a diameter of 3 mm with a micro syringe, each time 6 microliters until the solvent of the sample on the filter paper is dried , Move it to a prepared silicone plate, the filter paper from the end of the book about 1.5cm at one end. By the same method in the sample to be measured next to about