薄层色谱法定性测定橡胶中无机组分锌、钙和铁(+3)离子的操作过程如下:称取橡胶5克在750—800℃温度下灰化,灰分溶解于5毫升稀盐酸(1:1)中,在电炉上加热15—20分钟,制备的试液用薄层色谱法分析,在薄板上进行层析鉴定钙离子;鉴定锌、铁离子是在涂有加13％石膏的硅胶KCK的玻璃薄板上层析。硅胶按照文献中描述的方法 Thin layer chromatography Qualitative determination of inorganic components in rubber zinc, calcium and iron (+3) ion operation is as follows: Weigh rubber 5 grams at 750-800 ℃ temperature ash, ash dissolved in 5 ml of dilute hydrochloric acid (1 : 1), heated on an electric furnace for 15-20 minutes, the prepared test solution was analyzed by thin layer chromatography, chromatography on the plate identification of calcium ions; identification of zinc, iron ions are coated with silica gel plus 13% KCK glass plate chromatography. Silica gel according to the method described in the literature