使用Lumex测汞仪快速测定固体样品中总汞的方法

本文采用LUMEX测汞仪(RA-915+塞曼效应汞分析仪和配套PYRO-915热解装置),测定了沉积物、鱼、植物等固体样品(鲜样和干样)中的总汞,并采用相应的CRM物质作为质量控制指标。结果显示:沉积物、鱼、植物样品中汞的平均回收率分别为99.6%、100%、102%,相对误差分别为-0.0040%、-0.4440%、(2.0000%,标准偏差分别为0.0030、0.0050、0.0060,与其他方法比较有如下优点:无需消解、准确度高、测定速度快,是一种测定固体样品中总汞简便快捷的好方法。

The Method of Rapidly Measuring Total Mercury in Solid Samples Using Lumex Analytical Equipment

The total mercury (THg) in sediment,fish,plant samples were measured on a Zeeman atomic absorption spectrometer (ZAAS) which was manufactured by Lumex. This instrument consists of RA-915 + Zeeman analytical equipment with PYRO-915 pyrolysis unit. Attached THg in both dry and fresh samples can be detected by this instrument. The analytical accuracy was checked with certified reference materials (GSD-5,Tort-2 and GSB-11) in this study. The results showed that the average recoveries for THg in sediments,fish,plants in the samples were 99.6%,100%,102%,respectively,and the relative errors were-0.0040%,-0.4440% and +2.0000% ,respectively. The standard deviations were 0.0030,0.0050 ,0.0060,respectively. Compared with other methods,this method needs not to digest samples and has the advantages of high accuracy,easy performance and quick detection,which is one of the good methods to determine THg for solid samples.