铁对微量锌测定干扰的研究——原子吸收分光光度法

The Influence of Ferrous and Ferric on the Determination of Trace Zinc Analysis by Atomic Absorption Spectrophotometry

研究了原子吸收分光光度法测定微量锌时铁（Ｆｅ２＋，Ｆｅ３＋）的干扰作用，考察了共存离子ＮＨ＋４及酸性介质ＨＣＩ对测定的影响。结果表明，Ｆｅ２＋对测锌有正干扰，Ｆｅ３＋为负干扰。ＮＨ＋４和酸性介质（ｃ（ＨＣｌ）＜２．０ｍｏｌ·Ｌ－１）对测锌无干扰。

The influence of ferrous and ferric on the determination of trace zinc analysis by atomic absorption spectrophotometry was researched. The influence of ammonium in the solution system and acid medium( HCl) was also determined. The results showed that ferrous deceased the absorbance of zinc when the content of ferrous in the solution reached the influential level, while the influence of ferric was just reversed. Neither ammonium nor the acid medium (c(HCl)<2.0 mol/L) in the solution had influence on the determination of trace zinc analysis.