【摘要】 <正> 本文介绍了用改进型抗干扰(铀)荧光试剂(MAFG)激光荧光法快速测定地球化学样品中微量铀。其特点是直接利用电感耦合等离子体发射光谱法测定多元素后的“残液”,不需要对样品进行预制备过程。文中提出了校正铁内滤效应的简单方法。本方法的检出限为0.05微克/克。对GSD系列标准参考样品的七次重复测定,相对标准偏差为2.2％—7.1％。分析速度为每人每日100—150个样品。更多还原

【Abstract】 A laser-induced fluorometric method is described for rapid determination of micro-level uranium in geochemical materials with Modified Anti-interference reagent for uranium (MAFG). The method is characterized by direct using of the residual solution used in ICP-AES for simultaneous multi-element de-termination,therefore no prior sample preparation is required. A simple method for correcting the inner filter effect of iron is proposed. The detection limit of the method is 0.05ug/g. The relative standard deviation for seven replicate determinations of the standards GSD are ranged from 2.2-7.1%.更多还原