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本文研究了用正十八烷基胺硝酸盐的氯仿溶液,在pH6.5±0.5时,萃取硫代硫酸银络离子的情况。用该试剂可将银完全萃出,萃出的络合物形式为(C_(18)H_(37)NH_3)_3Ag(S_2O_3)_2。方法实际用于定影液中银的测定,得到了很好的结果。具体操作如下:取10ml分析试液于分液漏斗中,加氨溶液至pH6—7,加入2ml丙醇,10ml0.1M试剂的氯仿溶液,振荡4分钟,分相后把有机相移入另一分液漏斗中,加入10ml10％氨溶液并振荡6分钟。把氨溶液移入瓷蒸发皿中,加入10ml浓HNO_3,加热至硫
In this paper, we studied the extraction of silver thiosulfate ions with n-octadecylamine nitrate in chloroform at pH 6.5 ± 0.5. With this reagent, the silver can be completely extracted. The extracted complex has the form of (C_ (18) H_ (37) NH_3) _3Ag (S_2O_3) _2. The method was actually used for the determination of silver in the fixing solution, and good results were obtained. Specific operations are as follows: Take 10ml assay solution in a separatory funnel, add ammonia solution to pH6-7, add 2ml propanol, 10ml 0.1M chloroform reagent solution, shaken for 4 minutes, after phase separation organic phase into another In a funnel, 10 ml of 10% ammonia solution was added and shaken for 6 minutes. The ammonia solution into the porcelain evaporating dish, add 10ml concentrated HNO_3, heated to sulfur