固体直接进样-原子荧光法测定铜精矿中的汞

Determination of Mercury in Copper Concentrate by Using Direct Solid Sampling-atomic Fluorescence Spectrometry Method

采用固体进样原子荧光分析仪测定铜精矿中汞,无需进行样品的酸消解前处理,避免了元素损失,提高了检测效率。研究表明,采用归一化方法得出灰化程序为140 W,140 s,蒸发功率75 W,释放功率120 W,方法检出限为0.0050 mg/kg,通过与实验室常用经典方法(酸消解-原子荧光法)进行比对试验,两者检测结果无显著性差异。该方法适合于痕量分析,并且污染少,简便快速。

The current methods for determining copper concentrate mercury(Hg)require complicated pretreatments.A method was developed to determine copper Hg by using solid sample-atomic fluorescence spectrometry.The method avoided element loss and improved the analysis efficiency.The power and time of sample ashing were 140 W and 140 s,sample evaporating power was 75 W and sample releasing power was 120 W.The method detection limit was 0.0050 mg/kg.The results obtained by the present method were not significantly different from classical method(acid digestion-atomic fluorescence spectrometry method).The present method was suitable for trace analysis,less pollution and simple.