汞齐捕集-原子吸收光谱法测定铜精矿中汞含量

来源期刊：冶金分析2011年第4期

论文作者：郭芬 苏明跃 谷松海

文章页码：65 - 67

关键词：直接测汞仪； 铜精矿； 汞

Key words：direct mercury analyzer； copper concentrate； mercury

摘    要：无需进行样品消化处理,铜精矿粉末样品在253.7 nm处用直接测汞仪进行分析,5~6 min即可获取结果。为减少样品中汞对仪器的毒害同时保证测定结果的准确,样品取样量选择为0.15 g;同时,采用单个测定方式可减少样品舟存在的记忆效应。方法的检出限为0.2μg/kg。对3个不同含量范围铜精矿国家标准物质中的汞进行测定,结果同国标法的测定结果一致,相对标准偏差≤4.7%,回收率为98%~102%。

Abstract: It only took 5-6 min to determine powdered copper concentrate at 253.7 nm by a direct mercury analyzer without the need of sample digestion.In order to reduce the damage of mercury in sample to the instrument and guarantee the accuracy of determination results,the sampling amount was 0.15 g.Meanwhile,single determination mode was used to reduce the memory effect of sample boat.The detection limit of this method was 0.2 μg/kg.The content of mercury in three national certified reference materials of copper concentrate with different content ranges was determined.The results were consistent with those obtained by national standard method.The relative standard deviations (RSD) were smaller than or equal to 4.7%,and the recoveries were 98%-102%.