工业用碳酸氢钠 铁含量的测定 1,10-菲罗啉光度法

[中文适用范围]： 该方法适用于含量等于或大于0.1mg/kg的产品。 其原理在于用氯化羟铵还原铁(III)。 在缓冲溶液中形成铁(II)-1,10-菲咯啉络合物。 在约 510 nm 的波长下对有色复合物进行光度测量。 [外文原描述]： The method is applicable to products having a content equal to or greater than 0,1 mg/kg. The principle concists in reduction of the iron(III) by hydroxylammoniumchloride. Formation of a iron(II)-1,10-phennanthroline complex in a buffered solution. Photometric measurement of the coloured complex at a wavelength of about 510 nm.