地球化学样品中铀的激光荧光法测定

LASER FLUORESCENCE SPECTROMETRY FOR DETERMZNATION OF URANIUM IN GEOCHCMISTRY SAMPLE

采用四酸分解样品 ,盐酸浸取分取溶液 ,激光荧光法测定地球化学样品中的铀。应用内滤效应校正法和标准物质校正法 ,消除铁元素干扰而引起结果偏低的系统误差问题 ,取得了满意的效果 ,铀的检出限为 0 4 4μg/ g ;实际测定的精密度RSD≤ 5 51 %。

Adoption four kinds of acid decomposition sample,in the hydrochloric acid solution;the laser fluordscence spcstrometry measures the uranium in geochemistry sample.Applying the calibration method of inside filter effect and standard material,dissolving iron element interference to cause the low system error,obtain the satisfied results,the detection limit of the uranium is 0 44μg/g,relative standard deviation(RSD)≤ 5 5 % for the actual measurement.