ISO 3423:1975 工业用硫酸和发烟硫酸.二氧化硫含量的测定.碘滴定法

标准编号：ISO 3423:1975

中文名称：工业用硫酸和发烟硫酸.二氧化硫含量的测定.碘滴定法

英文名称：Sulphuric acid and oleums for industrial use — Determination of sulphur dioxide content — Iodometric method

发布日期：1975-11

标准范围

适用于SO2含量等于或大于2 mg/kg的产品。基于纯氮电流置换试验部分中存在的二氧化硫，并在已知体积的碘溶液中吸收。用标准体积硫代硫酸钠溶液滴定过量碘。吸收用玻璃仪器的示意图如图所示。

Applicable of products the SO2 content of which is equal to or more than 2 mg/kg. Based on the displacement of the sulphur dioxide present in the test portion by a current of pure nitrogen and absorption in a known volume of iodine solution. Titration of the excess of iodine with standard volumetric sodium thiosulphate solution. The diagram of the glass apparatus for absorption is shown in a figure.

标准预览图