ISO 8214:1985 表面活性剂.洗涤粉.无机硫酸盐的测定.重量法

标准编号：ISO 8214:1985

中文名称：表面活性剂.洗涤粉.无机硫酸盐的测定.重量法

英文名称：Surface active agents — Washing powders — Determination of inorganic sulfates — Gravimetric method

发布日期：1985-12

标准范围

通过乙醇萃取，从试验部分去除所有乙醇可溶物。在存在硅酸盐的情况下，残渣溶液用盐酸处理并蒸发至干燥。残渣溶解在水中，重复操作两次。过滤最后一种溶液，并在第一步的滤液或无硅酸盐溶液中用氯化钡沉淀硫酸盐。沉淀被过滤、洗涤、在900摄氏度下加热并称重。

From a test portion all ethanol-soluble matter is removed by extraction with ethanol. In the presence of silicates the solution of the residue is treated with hydrochloric acid and evaporated to dryness. The residue is dissolved in water and the operations are repeated twice. The last solution is filtered and in the filtrate or in the silicatefree solution of the first step the sulfates are precipitated with barium chloride. The precipitate is filtered, washed, heated at 900 degree Celsius and weighed.

标准预览图