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华中师大等三校编写的分析化学实验教材从1982年使用至今已有五年了。该教材定性分析中阳离子系统分析是将原来五组硫化氢系统分析方案改为四组简易硫化氢系统分析方案。此方案比较简捷,便于初学者掌握,组与组之间的分离和组内离子间的分离都较干净;离子鉴定反应现象也明显,将硫化氢改为硫代乙酰胺(TAA)减少了对空气的污染和人体的毒害作用。如果今后在教学中增加 S~(2+)的鉴定采用五组硫化氢系统分析方案,而在具体分析步骤上仍使用简易硫化氢系统的某些方法,就一定能获得更佳效果。为此。我们据这几年实践的体
Central China Normal University and other three schools of analytical chemistry experimental teaching materials used since 1982 has been five years. The textbook qualitative analysis of the cation system analysis is the original five hydrogen sulfide system analysis program to four simple SiHS analysis program. This scheme is relatively simple and easy for beginners to grasp, the separation between groups and groups and the separation of ions within the group are relatively clean; the phenomenon of ion identification reaction is also obvious. The change from hydrogen sulfide to thioacetamide (TAA) Air pollution and human poisoning effect. If in the future to increase the teaching of S ~ (2+) identification using five sets of hydrogen sulfide system analysis program, and in the specific analysis steps are still using some simple hydrogen sulfide system will certainly be able to get better results. to this end. We based on the practice of the past few years