近年来光度法测定硅酸盐样品中的亚铁已取得了一定的进展。主要工作集中在两个方面:一是研制能在强酸性介质中与Fe~(2+)形成热稳定性良好的络合物的新型显色剂,二是寻找简便有效的分解方法,尽可能防止Fe~(2+)在分解过程中氧化。用氢氟酸-硫酸溶样,Fe~(2+) In recent years, photometric determination of ferrous silicate samples have made some progress. The main work focused on two aspects: First, the development of strong acid medium with Fe ~ (2+) to form a good thermal stability of the complex new reagent, the second is to find a simple and effective decomposition method, as far as possible Prevent oxidation of Fe ~ (2+) during decomposition. With hydrofluoric acid - sulfuric acid sample, Fe ~ (2+)