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文章叙述了阳离子交换分离-发射光谱法测定金属铀或八氧化三铀中微量硼的方法。在试样溶解和蒸发过程中,采用甘露醇络合硼以防止硼的蒸发损失,用阳离子交换分离法将硼与大量铀及其它多种阳离子分离后,用以氟化钠为外加基体,铍为内标,平头石墨电极,交换电弧为激发光源的溶液干渣光谱法测定硼。取样0.4g时,测定下限可达0.012ppm。此时方法的相对标准偏差为±18%,当硼含量为0.04ppm时,相对标准偏差为±9%,方法回收率为108-111%,方法简单、快速、测定下限低、干扰小,经与其它分析方法核对数据,证明方法可靠,可满足测定要求。
The article describes the cation exchange separation - emission spectrometry method for the determination of trace amounts of trace uranium or uranium tungstate. During sample dissolution and evaporation, mannitol was used to complex boron to prevent the evaporation loss of boron. After cation exchange separation was used to separate boron from a large amount of uranium and many other cations, sodium fluoride was used as an additional substrate, and beryllium Determination of boron for solution with internal standard, flat graphite electrode and exchange arc as excitation light source. Sampling 0.4g, the lower limit of determination of up to 0.012ppm. The relative standard deviation of this method was ± 18%. When the boron content was 0.04ppm, the relative standard deviation was ± 9%. The recovery rate was 108-111%. The method was simple and rapid, the determination limit was low and the interference was small. Check the data with other analysis methods to prove that the method is reliable and can meet the determination requirements.