光度法测定中药中的微量铁

The Detemination of Trace Iron in Herb by Photometric Method

在ｐＨ为４的醋酸—醋酸钠介质中，用盐酸羟胺将三价铁还原成两价铁，邻菲罗啉作显色剂，测定中药中的微量铁。该法简便，重现性好，准确度和精密度都能满足要求。

Iron ion is reduced by hydroxylamine hydrochloride from three-valence totwo-valence in the medium of acetic acid soclium acetate, pH4. The trace iron in Herb istested by photometric method, chromogenic reagent for O phenanthroline. The methodis simple、convenient and repeatable. Accuracy and precision are meeted.