本工作曾将难电离的镁元素和稀土元素钆以一定的化学形态涂在同一条样品带上成为混合样品,同时对镁和钆两种元素同位素进行质谱分析。实验结果表明用1～2微克的混合样品进行质谱分析,可获得稳定离子流达1小时以上。用这种方法对镁和钆同位素分离产品进行了同位素丰度测定。 In this work, it was difficult to ionize magnesium and rare earth gadolinium in a certain chemical form coated on the same sample to become a mixed sample, while magnesium and gadolinium two elements isotope mass spectrometry. Experimental results show that with 1 ~ 2 micrograms of mixed samples for mass spectrometry, stable ion flow can be obtained for more than 1 hour. The isotopic abundances of magnesium and gadolinium isotope separation products were determined by this method.