论文部分内容阅读
本文叙述了萃取分离、金膜电极电位溶出法测定氧化锑中微量砷。将氧化锑溶于盐酸后经苯萃取和水反革取以分离出砷(Ⅲ),然后在—0.5V(vs.SCE)电位下同位镀金并富集砷,最后进行电位溶出,氧化剂为金(Ⅲ)。本法简单、快速、灵敏度比钼蓝光度法测砷高二个数量级,在大量锑(Ⅲ)存在下用电位溶出法测定砷尚未见有报道。本法对研制超细氧化锑工作有重要作用。
This article describes the extraction and separation, gold electrode potential stripping method for the determination of trace arsenic in antimony oxide. After the antimony oxide is dissolved in hydrochloric acid, the arsenic (Ⅲ) is separated by benzene extraction and water counter-countercurrent, then gold is grounded and enriched arsenic at -0.5V (vs.SCE) potential, and finally the potential is eluted. The oxidant is gold (III). The method is simple, rapid and sensitive, which is two orders of magnitude higher than that of molybdenum blue photometry. There is no report on the determination of arsenic by potentiometric stripping in the presence of a large amount of antimony (Ⅲ). This Law plays an important role in the development of ultra-fine antimony oxide.