ICP发射光谱法测定基性、超基性岩中的稀土元素

The Determination of REE in Basic and Ultra-basic Rocks by ICP-AES

基性、超基性岩中的稀土元素含量极少,尤其后者,比花岗岩低1至2个数量级。文献用中子活化法测定两个超基性岩标样报出11项稀土元素含量。据此估算稀土总量约Xppm,其分量达ppb级,属超微痕量级,给富集和检测带来困难。目前,除中子活化分析外未见到其它方法测定的报导。

REE in basic and ultra basic rocks were seperated and preconcentrated by chemical pre-treatment.The samples were delivered by a desolution system,the torch was positioned horizentally and the spectra were viewed at the top of the ICP-torch.The detection limits were o.x-x ppb.RSD were 1.4-4.7%.The optimum pH value of P507 resin adsorbing the REE and the conditions of leaching them off were studied also.