标准摘要
[中文适用范围]： 适用于硫酸盐含量等于或大于0.0005%（m/m）的产品。 通过氢碘酸和次磷酸的混合物将硫酸盐还原为硫化物进行分析。 在丙酮和氢氧化钠溶液的混合物中吸收放出的硫化氢。 在双硫腙作为指示剂的情况下，用乙酸汞(II)标准滴定溶液滴定。 也得到了 IUPAC 的批准。 [外文原描述]： Applicable to products having sulphate contents equal to or more than 0.0005 % (m/m). Analysis by reduction of the sulphate to sulphide by a mixture of hydriodic acid and hypophosphorus acid. Absorption of the hydrogen sulphide evolved in a mixture of acetone and sodium hydroxide solution. Titration with a standard volumetric solution of mercury(II) acetate in the presence of dithizone as indicator. Has also been approved by the IUPAC.
英文名称Phosphoric acid for industrial use — Determination of sulphate content — Method by reduction and titrimetry