原子吸收法测定原镁石中痕量镉的研究

Study of Determination of Trace Cadmium in Magnesite by Graphite Furnace Atomic Absorption Spectrometry

本文采用钴和样品自身消化反应产物硝酸镁作为混合基体改进剂，塞曼石墨炉原子吸收法测定原镁石中痕量镉，确定了仪器工作参数和测定条件，测定的相对标准偏差（ｎ＝９）小于１０％，用标准加入法测定镉的回收率为８８％－１０４％。

This is a method for determining cadmium in magnesite by using zeeman graphite furnace atomic absorption spectrometry. Cobalt and magnesium nitrate that the major component of the sample were used as a mixed matrix modifier to eliminate the interference. The detection limit are 0.03ng/mL. The relative standard deviation was 8.3%. Recoveries of standard additions were satisfactry.