电感耦合等离子体发射光谱（ICP-OES）法测定低品位铬铁矿中Cr含量

Determination of Chromium in Low-grade Chromite by Inductively Coupled Plasma Optical Emission Spectrometry

建立了一套快速准确测定低品位铬铁矿中Cr的分析方法。通过采用浓硝酸-硫磷混酸对试样进行消解,利用电感耦合等离子体发射光谱(ICP-OES)法测定低品位铬铁矿中Cr。方法检出限低,测定范围宽,线性范围内相关系数R为0.9999,相对标准偏差在2.0%~6.0%,加标回收率在96.8%~105%,方法对比数据吻合,结果满意,适宜推广应用。

A set of analytical methods for rapid and accurate determination of Cr in low-grade chromite ore were established.After the sample was digested by concentrated nitric acid-sulfur phosphorous mixed acid,Cr in low-grade chromite ore was determined by inductively coupled plasma optical emission spectrometry.The detection limit of this method is low,and the measurement range is wide.The correlation coefficient R in the linear range is 0.9999.The relative standard deviation was 2.0%—6.0%and the recovery was between 96.8%—105%.The results of the method were consistent and satisfactory.The method is suitable for promotion.