微波消解-ICP-MS测定海洋沉积物中的稀土元素

Determination of Rare Earth Elements in Marine Sediments by Microwave Digestion ICP-MS

建立了一种微波消解前处理样品,使用电感耦合等离子体质谱测定海洋沉积物中14种稀土元素的方法。研究了称样量、微波消解程序、酸的配比及复溶酸对稀土元素测定的影响。试验结果表明,14种稀土元素的方法检出限为0.001~0.088μg/g,精密度(RSD)均低于8%,实际样品加标回收率介于83.6%~113.7%之间。通过测定国家标准物质GBW07335、GWB07336、GBW07314、GBW07316,得到测定值与标准值一致,满足实际分析要求。

A method of determination of 14 rare earth elements in marine sediments by inductively coupled plasma mass spectrometry with microwave digestion has been established.The effects of sample weight, microwave digestion procedure, acid ratio and resolution acid on the determination of rare earth elements were studied.The detection limit of 14 rare earth elements was 0.001~0.088 μg/g, the precision(RSD) was lower than 8%,and the recovery rate of the actual sample was between 83.6%~113.7%.By measuring the national standard substances GBW07335,GBW07336,GBW07314 and GBW07316,the measured value was consistent with the standard value, which meet the actual analysis requirements.