ICP-OES法测定锌片中的Al、Fe、Sb杂质含量

Determination of Content of Al,Fe and Sb Impurities in Zinc Flakes with ICP-OES Method

样品经稀硝酸溶解完全后,选取Al 167.079 nm、Fe 238.204 nm、Sb 206.833 nm作为分析线,建立电感耦合等离子体全谱发射光谱法(ICP-OES)测定锌片中杂质元素(Al、Fe、Sb)含量的方法。实验表明,检测范围为Al:0.50~5.0μg/m L,Fe:0.05~0.50μg/m L,Sb:0.05~0.50μg/m L。校准曲线线性相关系数均在0.999以上。方法的检出限为0.018~0.100μg/g。按照实验方法测定锌片生产样品,结果的相对标准偏差(RSD,n=10)均小于5.0%,加标回收率在98%~102%之间。

After the sample was completely dissolved by dilute nitric acid,the method for determining contents of impurity elements( Al,Fe and Sb) in zinc flakes with inductively coupled plasma optical emission spectrometer( ICP-OES)was established by selecting Al 167. 079 nm,Fe 238. 204 nm and Sb 206. 833 nm as the analytical line. The results showed that the detection ranges of Al,Fe and Sb were 0. 50 ~ 5. 0 μg/m L,0. 05 ~ 0. 50 μg/m L and 0. 05 ~ 0. 50 μg/m L respectively. The linear correlation coefficients of calibration curve were all over 0. 999 and the detection limit of method was 0. 018 ~ 0. 100 μg/g. The production samples of zinc flakes were determined according to the experimental method,the relative standard deviations( RSD,n = 10) were all smaller than 5. 0% and adding standard recovery was 98% ~ 102%.