地质样品中的三价铁一般都采用测定全铁和亚铁后用差减法求得其含量。诚然,该分析结果将直接受亚铁的测定方法的准确度所左右。而就目前的亚铁分析方法来说,由于其本身存在着价态变化,受外界的干扰因素较多,测得的结果往往具有一定的相对性。因此,探索一个直接测定三价铁的分析方法是有其实用意义的。 Geological samples of ferric iron are generally used after the determination of total iron and ferrous sub-subtraction method to find its content. True, the results of this analysis will be directly dictated by the accuracy of ferrous determination methods. However, as far as the current ferrous analysis method is concerned, because of its own valence state change and more interference factors from the outside world, the measured results tend to have certain relativity. Therefore, to explore a direct determination of ferric iron analysis method is of practical significance.