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本文叙述了在5M盐酸介质中和按体积比40％的醋酸存在下,以试亚铁灵为指标剂用铁氰化钾(Ⅲ)测定锑的方法。已测定了吐酒石,焊锡以及生铅中的锑,As~(3+)不干扰测定。直到目前,在已发表的极导中用铁氰化钾(Ⅲ)直接滴定Sb~(3+)尚没有合适的方法。Fresno和Valdes在50～60°温度下于浓NaOH溶液中作了电位滴定,Kiboku用间接法把Sb3~1沉淀为硫化物,使之重新溶解于NaOH或Na_2CO_3溶液中,然后以亚硝基铁氰化钠为指示剂,用铁氰酸盐滴定S~—、Zhdanov和Kurchina研究了安培滴定并认为所得结果是错误的和不能重现的。在这篇报导中,我们提出了以试亚铁灵为指示剂,用铁氰化钾(Ⅲ)直接滴定锑(Ⅲ)的简单方法。此方法已用于吐酒石,生铅和焊锡中锑的测定。
This article describes a method for the determination of antimony with potassium ferricyanide (Ⅲ) using ferulitin as an indicator in 5M hydrochloric acid medium and in the presence of 40% acetic acid by volume. The tartar, solder, and lead in lead have been measured. As ~ (3+) does not interfere with the determination. Until now, there has been no suitable method for direct titration of Sb ~ (3+) with potassium ferricyanide (III) in the published polar guide. Fresno and Valdes potentiometric titration in concentrated NaOH solution at 50 ~ 60 ° C, Kiboku precipitated Sb3 ~ 1 as sulfide by indirect method, re-dissolved in NaOH or Na_2CO_3 solution, and then with nitroso iron Sodium cyanide was used as an indicator to titrate S ~ - with iron cyanate, Zhdanov and Kurchina studied the amperometric titration and concluded that the results were wrong and not reproducible. In this report, we propose a simple method of titrimetric titration of antimony (III) with potassium ferricyanide (III) using test-ferretin as an indicator. This method has been used for the determination of antimony in tartar, lead and solder.