样品被新生的氢碘酸水解。用标准体积硫代硫酸钠溶液滴定释放出的碘。本方法适用于初级饱和脂肪醇、油醇、饱和脂肪酸、直链和支链烷基酚的聚乙氧基化衍生物的分析。它不适用于含有硫或氮的化合物、含有氧丙烯基的化合物、醛或缩醛、甾醇和衍生物。

The sample is hydrolyzed by nascent hydroiodic acid. The iodine liberated is titrated with a standard volumetric sodium thiosulfate solution. The method is applicable to the analysis of polyethoxylated derivatives of primary saturated fatty alcohols, oleyl alcohol, satureted fatty acids, straight and branched chain alkylphenols. It is not applicable in the present of compounds containing sulfur or nitrogen, compounds containing oxypropylene group, aldehydes or acetals, sterols and derivatives.