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前言镀铬溶液中氟硅酸盐的测定,一般采用硝酸钍滴定法。该法需将镀液的主体成分和杂质进行沉淀分离,操作繁杂,且铝、锌、铬(Ⅲ)等离子未能完全除去。已有资料报道,可采用氟离子选择电极法,不需经过分离手续,但仍不能消除铝的干扰。我们拟用氟离子选择电极在柠檬酸钠介质中测定,以消除铝、铁等杂质离子的影响。本文
Preface Chromium fluoride solution in the determination of fluoride, thorium nitrate titration method. The law requires the main components of the bath and impurities precipitation separation, complicated operation, and aluminum, zinc, chromium (Ⅲ) plasma can not be completely removed. It has been reported that fluoride ion selective electrode method can be used, without going through separation procedures, but still can not eliminate the interference of aluminum. We intend to use fluoride ion selective electrode in sodium citrate medium determination, in order to eliminate the impact of impurities such as aluminum, iron and other ions. This article