一、概述物质的完全分析,除分析阳离子外,还要分析阴离子。但阴离子的分析与阳离子不同,现在还没有一套公认的分析方法,已有的阴离子分析法,主要分为系统分析[1—4]和分部分析(5—8]两大类。前者由于有些阴离子不甚稳定,经过系统分析的冗长操作程序,常常引起破坏、损失而降低了分析结果的可靠性,所以很少有人应用。后者,虽较灵活、简便、省时,但因纷乱而无系 First, an overview of the complete analysis of the material, in addition to the analysis of cations, but also analysis of anions. However, the analysis of anions is different from that of cations, and there is not yet a set of accepted analytical methods. The existing anion analysis methods are mainly divided into system analysis [1–4] and segment analysis (5–8). Some anions are not very stable, and the lengthy operating procedures through systematic analysis often cause damage and loss, which reduces the reliability of the analysis results, so it is rarely used. The latter, although more flexible, simple, time-saving, but due to chaos No line