论文部分内容阅读
无机定性分析化学经典方法中所用的硫化氢气体,毒而有臭;作阳离子沉淀剂时,容易生成胶态沉淀,有碍离子的分离与检出;在操作过程中还需要气体发生器的装置,目前各种装置的性能尚不够完善,使硫化氢用量不易控制。因此在用硫化氢作沉淀剂的分析过程中往往感到不便和困难。为避免此项缺点,早在1860年时,Bichoff 等曾提出改进方法,不用硫化氢作沉淀剂的阳离子硫化物分析系统,在1867年时 Zettnow等曾经提出非硫化物分析系统的方法。二种方向的
Hydrogen sulfide gas used in the classical method of inorganic qualitative analysis chemistry is poisonous and stinky. When used as a cationic precipitating agent, colloidal precipitates are easily generated, which impedes the separation and detection of ions. In operation, a gas generator device is also required At present, the performance of various devices is not yet perfect, so that the amount of hydrogen sulfide is not easy to control. Therefore, it is often inconvenient and difficult to analyze hydrogen sulfide as a precipitating agent. To avoid this shortcoming, as early as 1860, Bichoff et al. Proposed a method of improving sulfide sulfonate without using hydrogen sulfide as precipitant. In 1867, Zettnow et al. Proposed a non-sulfide analysis system. Two directions