There are three purity measuring methods of vulcanizing accelerator NOBS: potentiometric titration, indicator titration and liquid chromatography.

前言：硫化促进剂nobs纯度的测定方法有三种：电位滴定法、指示剂滴定法和液相色谱法。

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There are three purity measuring methods of vulcanizing accelerator NOBS: potentiometric titration, indicator titration and liquid chromatography.

前言：硫化促进剂nobs纯度的测定方法有三种：电位滴定法、指示剂滴定法和液相色谱法。

youdao