关於硫酸盐的分析,一直是用氯化钡从微酸性溶液中将硫酸盐沉淀为硫酸钡的重量法,在理论上看起来好像很简单,但可能之误差及影响之因子甚多,尤其在土壤分析上,经常遇到的。如土壤提取液混浊,滤纸致密度较差等,就严重的影响着灼烧后的称重,另一方面由於花费时间长,在我们分析大批样品的操作上更是感到困难,为了工作的需要 The analysis of sulphate has been the gravimetric method of precipitating sulphate to barium sulphate from slightly acidic solutions using barium chloride, which in theory may seem simple, but there are many possible errors and factors affecting it, especially in Soil analysis, often encountered. Such as soil extract cloudy, poor filter density, etc., will seriously affect the weight after burning, on the other hand due to the long time consuming, in our analysis of a large number of samples is more difficult operation, in order to work needs