Through the comparison of the three measuring methods of vulcanizing accelerator NOBS , the reason of adopted potentiometric titration in the revised GB/T8829 is illuminated.

• 通过对硫化促进剂NOBS三种测定方法优缺点的比较,阐明了修订后的GB／T8829纯度测定采用电位滴定法的原因。