铬矿石冶炼废渣中砷的氢化物发生-原子荧光光谱法快速测定

Rapid Determination of As in Smelting Slag of Chromium Ore by Hydride Generation Atomic Fluorescence Spectrometry

用硝酸、高氯酸湿法分解样品,加硫脲、抗坏血酸还原样品.对氢化物发生-原子荧光光谱法测定铬矿石冶炼废渣中微量砷的方法进行探讨.方法回收率在96.2%-102.0%之间,相对标准偏差在1.2%-2.5%,方法的检出限为6.6×10-11g/mL,线性回归方程为：IF=5034.6C＋7.8,相关系数为：0.9994.试验证实该方法具有简便快速、准确可靠、可测范围宽等优点,是一种行之有效的检测方法.亦为铬矿石冶炼废渣处理对环境保护的影响提供了科学依据.

The hydride generation-atomic fluorescence spectrometrc determination of trace arsenic in chromium ore smelting slag is preseuted.The prefreatment of the sample is the use of the wet decomposition by nitric and perchloric acid with the addition of thiourea and ascorbic acid to reduce arsenic.The recovery of the method was 96.2%~102.0%,and the relative standard deviation： IF=5034.6c＋7.8,correlation coefficient： 0.9994.The test verified that the method is simple,rapid,accurate and reliable with a wide moasurement range and is an effective detection method,which also provides a scieatific basis for the impact of ore smelting waste on the environmental protection.