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本文采用ICP-MS法对成年人器官组织中痕量钍、铀、铯进行了研究,选择了测定的仪器参数,检查了测定中的干扰和影响;用铼(Re)作为内标元素补偿基体抑制效应和灵敏度的漂移~(1,2,3)。钍、铀、铯的检出限为(0.0057-0.0178)μg·L~(-1)。随同样品分析了NIST SRM 1566a牡蛎、8414牛肌肉、1486骨粗粉标准参考物质,测得值与标准参考值基本相符。在严格分析质控基础上,用混酸消解样品,不须分离富集,直接对成年人肝、肾、肺、肌肉、骨粉中钍,铀,铯元素进行测定。
In this paper, trace amounts of thorium, uranium and cesium in adult organ tissue were studied by ICP-MS method. The parameters of the instrument were determined and the interference and influence in the determination were examined. The rhenium (Re) Inhibition effect and sensitivity drift ~ (1,2,3). The detection limits of thorium, uranium and cesium were (0.0057-0.0178) μg · L -1. With the same sample analysis of NIST SRM 1566a oysters, 8414 cattle muscle, 1486 bone meal standard reference material, measured values and the standard reference values are basically consistent. On the basis of rigorous analysis of quality control, the samples were digested with mixed acid and the contents of thorium, uranium and cesium in liver, kidney, lung, muscle and bone meal were determined directly without separation and enrichment.