论文部分内容阅读
克利申(5-氨基噻唑-2-硫代甲酰胺),曾用作钯(Ⅱ)、铜(Ⅱ)、汞(Ⅱ)等的分析试剂;硫代苯甲酰胺可用作铜(Ⅱ)、银(Ⅰ)、汞(Ⅱ)等的试剂。因此,我们试验了克利申与银离子的反应性能。实验中发现,在pH3的乙酸缓冲溶液中,克利申与银离子形成棕红色沉淀,瞬时即转为黑色沉淀。克利申在酸性条件下,与常见金属阳离子的反应尚未见到上述现象。为此,我们试验了克利申与银离子的反应条件、灵敏度、溶解度、稳定性等。克利申与银离子形成的沉淀难溶于甲醇、乙醇、戊醇、乙醚、苯,部分溶于四氯化碳和氯仿中。克利申银的稳定性介于银氨络离子和银氰络离子之间。
Clixin (5-aminothiazole-2-thiocarboxamide) has been used as palladium (Ⅱ), copper (Ⅱ), mercury (Ⅱ) and other analytical reagents; , Silver (Ⅰ), mercury (Ⅱ) and other reagents. Therefore, we tested the reaction performance between Krishno and silver ions. The experiment found that in pH3 acetate buffer solution, Krishno and silver ions form a red-brown precipitate, instantaneously turn into a black precipitate. Clisson under acidic conditions, with common metal cation reaction has not seen the above phenomenon. For this reason, we tested the reaction conditions, sensitivity, solubility, stability and other factors of Krishno and silver ions. The precipitate formed by Krishno and silver ions is hardly soluble in methanol, ethanol, amyl alcohol, diethyl ether and benzene, and partly soluble in carbon tetrachloride and chloroform. The stability of Krishno silver is between that of silver ammine and silver cyanide ions.