ISO 5523:1981 水果和蔬菜制品.二氧化硫含量的测定（常规法）

标准编号：ISO 5523:1981

中文名称：水果和蔬菜制品.二氧化硫含量的测定（常规法）

英文名称：Liquid fruit and vegetable products — Determination of sulphur dioxide content (Routine method)

发布日期：1981-08

标准范围

游离二氧化硫的测定包括在pH值介于0.7和1之间的情况下对产品进行直接碘量滴定，然后对产品进行空白滴定，通过回流沸腾或将其游离二氧化硫含量与过量乙醛或丙醛结合，使其不含二氧化硫。在滴定游离化合物、使产物呈碱性并滴定在酸性介质中用碘水解释放的二氧化硫后，测定键二氧化硫。

The determination of free sulphur dioxide consists in direkt iodometric titration of the product at a pH between 0,7 and 1, followed by blank titration of the product, freed from sulphur dioxide by boiling under reflux or by binding its free sulphur dioxide content with an exess of acetaldehyde or propioaldehyde. The bond sulphur dioxide is determined after titration of free compound, rendering of the produkt alkaline and titration of the sulphur dioxideliberated by hydrolysis with iodine in an acid medium.

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