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本文采用新型D-238树脂,使待测元素与基体La分离。用6mol/L HNO_3解脱非稀土杂质,ICP-AES法同时测定4N光学级La_2O_3中8个痕量非稀土杂质。方法的检出限为0.2～2.8μg/g,相对标准偏差<8%。
In this paper, a new D-238 resin, the element to be tested and the substrate La separation. Non-rare earth impurities were liberated with 6 mol / L HNO 3 and 8 trace non-rare earth impurities in 4 N optical grade La 2 O 3 were simultaneously determined by ICP-AES. The detection limit of the method was 0.2 ~ 2.8μg / g with relative standard deviation <8%.