极谱法测定二苯胺磺酸钠的研究

本文报道两种测定二苯胺磺酸钠的极谱方法，它们是基于在Ｈ２ＳＯ４和ＮａＮＯ２介质中二苯胺磺酸钠被定量亚硝化，然后用极谱法测定其亚硝化产物。这两种方法分别是以标准ＮａＮＯ２作基准的极谱测定法和以纯二苯胺磺酸钠为基准的单扫描示波极谱法。应用这两种方法于化学试剂二苯胺磺酸钠含量的测定，结果令人满意。

Study on the Determination of Sodium Dipheny- lamine-4-sulphonate by Polarogapby

Two methods for the determination of sodiumdiphenylamine-4-sulphonate(R)were reported basedon stoichiometric nitrosation of R in NaNO_2 andH_2SO_4 medium and subsequent polarograpic measure-ment of N-nitroso-R,One method is polarographictitration using standardized NaNO_2 as the standard so-lution and the other is linear-sweep voltammetricmethod using purified R as standard.These methodswere applied to the determination of the content of Rin chemical reagents with satisfactory results.