ISO 3431:1976 主要用于制铝的氟化钠.可溶性硫酸盐含量的测定.浊度测定法

标准编号:ISO 3431:1976

中文名称:主要用于制铝的氟化钠.可溶性硫酸盐含量的测定.浊度测定法

英文名称:Sodium fluoride primarily used for the production of aluminium — Determination of soluble sulphates content — Turbidimetric method

发布日期:1976-07

标准范围

适用于SO4含量超过0.05%(m/m)的产品。包括测试部分在盐酸中的溶解和在盐酸溶液中的蒸发,以进行干燥。在盐酸溶液中溶解残留物。在特定条件下,使用波长约470nm的分光光度计或光电吸收计测量硫酸钡沉淀后的浊度。

Applicable to products having SO4 contents of more than 0.05 % (m/m). Covers the dissolution of the test portion in hydrochloric acid and evaporation in hydrochloric acid solution for drying. Dissolution of the residue in a hydrochloric acid solution. Measurement of the turbidity obtained by precipitation, under specified conditions, of barium sulphate using a spectrophotometer at a wavelength of about 470 nm or a photoelectric absorptiometer.

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