关于微量铁分析方法的研究,是分析工作者长期深入探讨的问题之一。就目前的分光光度法研究应用而言,有关的报导为数不多,又由于所牵涉的显色剂的特殊性,使得推广应用受到很大局限,同时又受设备及操作条件限制,方法的灵敏度、选择性也不够理想。文中采用分析工作者多为应用的熟悉的高灵敏度偶氮杂环染料试剂4—(2—吡啶偶氮)间苯二酚 Research on trace iron analysis is one of the problems analysts have explored in the long run. For the current application of spectrophotometry research, the reports are few, and because of the special nature of the developer involved, making the promotion of application is very limited, but also by the equipment and operating conditions, the sensitivity of the method Selectivity is not ideal. In this paper, the analytical workers are mostly applied to the well-known high sensitivity azo heterocyclic dye reagent 4- (2-pyridylazo) resorcinol