标准摘要
[中文适用范围]： 规定了使用还原钼硅酸盐测定氟化钠中二氧化硅含量的分光光度法。 适用于五氧化二磷含量不超过0.02%（m/m）的产品。 [外文原描述]： Specifies a spectrophotometric method, using the reduced molybdosilicate, for determining the silica content of sodium fluoride. Applicable to products of which the phosphorus pentoxide content does not exceed 0,02 % (m/m).
英文名称Sodium fluoride primarily used for the production of aluminium — Determination of silica content — Reduced molybdosilicate spectrophotometric method