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氯化亚銅的含量测定方法,一般将其溶于盐酸,借亚銅氯絡离子(CuC_3~=)还原Fe~(+++),生成的Fe~(++),以磷酸为掩蔽剂,用高錳酸鉀溶液进行氧化还原法滴定;或采用以邻啡囉啉-亚鉄絡合物为指示剂,以重鉻酸鉀溶液进行氧化还原法滴定。碘化亚銅的含量测定,由于它在稀酸中都不溶解,也难溶于碘化鉀,而易溶于氰化碱金属盐、硫代硫酸盐及氨水等。所以一般文献上将其溶于氨水中,形成可溶性的亚銅氨絡离子后,以电解法进行測定其銅含量或溶液用盐酸酸化后,以硫代硫酸鈉溶液滴定析出碘;碘化亚銅或溴化亚銅亦采用以氧化剂氧化成为銅盐后,以碘量法进行測定。作者經实驗結果,发現氯化亚銅、碘化亚銅及溴化亚銅溶于氨水中,生成亚銅氨絡离子,以紫脲酸銨为指示剂,可直接以标准的乙二胺四乙酸二鈉溶液进行絡合滴定。由条件試驗結果得知,滴定的精确度主要决定于pH植,在氨浓度太高的溶液中,絡合滴定过程中颜色
The content of cuprous chloride is generally measured by dissolving it in hydrochloric acid, reducing Fe ~ (+++) by cuprous chloride chloride ion (CuC_3 ~ =), generating Fe ~ (++), using phosphoric acid as masking agent , Redox titration with potassium permanganate solution or titration with redox method with potassium dichromate solution using o-phenanthroline-azulene complex as an indicator. Determination of copper iodide content, because it is not dissolved in dilute acid, it is also difficult to dissolve in potassium iodide, and soluble in alkali metal cyanide, thiosulfate and ammonia and so on. Therefore, the general literature will dissolve in ammonia, the formation of soluble cuprous ammonia ion, the electrolytic method for the determination of its copper content or acidified with hydrochloric acid, sodium thiosulfate titration titration of iodine; cuprous iodide Or cuprous bromide is also oxidized with an oxidizing agent to form a copper salt, and the iodine amount method is used for the determination. The experimental results show that cuprous chloride, cuprous iodide and cuprous bromide dissolved in ammonia, generating cuprous ammonia complex ion to ammonium urethane as an indicator, can be directly to standard ethylenediamine Disodium acetate solution complexation titration. According to the results of the condition test, the accuracy of the titration is mainly determined by the pH level. In the solution with high ammonia concentration, the color of the titration process