微量(或痕量)银的分析通常采用火试金法、沉淀法、离子交换吸附法、色谱法、溶剂萃取等分离富集手段,这些方法均能达到富集和排除干扰的目的,但其分析程序往往冗长或污染环境。被应用到原子吸收分析中的电解预浓缩技术是一种有效的分离富集手段。文献比较了19种元素的检出限,指出,电沉积-EAAS法的检出限比EAAS法的检出限通常可改善1～2个数量级。E.J.Chobik将被测元素预先富集在钨丝上,然后将钨丝插入石墨炉内原子化,成功测定了海水和血液中的Pb。苏庆平评述了钨丝工作头在FAAS和EAAS中的利弊。并列出 The analysis of trace (or trace) silver usually uses the method of precipitation, precipitation, ion exchange adsorption, chromatography, solvent extraction and other methods. All these methods can achieve the purpose of enrichment and interference elimination. However, Analytical procedures tend to be lengthy or polluting the environment. Electrolytic preconcentration technology applied to atomic absorption analysis is an effective means of separation and enrichment. The literature compares the detection limits of 19 elements and points out that the detection limit of electrodeposition-EAAS method can be improved by one or two orders of magnitude better than the detection limit of EAAS method. E.J. Chobik pre-enrichment of the elements under test on the tungsten wire, and then tungsten wire inserted into graphite furnace atomization, the successful determination of seawater and blood Pb. Su Qingping reviewed the pros and cons of tungsten working head in FAAS and EAAS. And list