摘要
分别用ＮａＣｌ溶液、氨水、抗坏血酸溶液处理含银废液，将其中的银转化为单质银，其用稀ＨＮＯ３溶解后，即制成完全符合容量分析标准的ＡｇＮＯ３溶液。此溶液可以稀释成各种浓度使用；也可以蒸发浓缩至干，用水和乙醇混合溶剂重结晶，在１２０℃下烘干２ｈｒ．，即制成固体ＡｇＮＯ３，其纯度可以达到９９．８％以上，杂质含量与市售分析纯试剂相比较也非常接近。
Silver in simple substance was obtained by treating the silvercontained waste liquid in laboratory with the solutions of sodium chloride, ammonia and ascorbic acid respectively. It was then dissolved in dilute nitric acid to form the solution of silver nitrate, which is completely accord with the standard of volumetric analysis. The solution of silver nitrate can be diluted to different concentration as needed, and also can be concentrated, recrystallized from ethanolwater and dried at 120℃ so as to get the solid silver nitrate, the content of which is above 99.8% and the amount of impurities are much similar to that of commercial analytic pure agent as well.
出处
《西南农业大学学报（自然科学版）》
CSCD
1998年第3期279-282,共4页
Journal of Southwest Agricultural University
关键词
废液
银
回收
硝酸银
氨水
waste liquid
silver
recovery
silver nitrate
ammonia water
