氢化物发生-原子荧光光谱法测定锡矿岩芯样品中锡的含量

建立氢化物发生-原子荧光光谱法测定锡矿岩芯样品中锡的分析方法。试样以过氧化钠熔解,用热水浸出,盐酸酸化。优化了仪器的最佳条件,考察了硼氢化钾浓度、酸度、共存元素等条件对测定的影响。方法相对标准偏差为2.52 %～7.28 %,加标回收率95.20 %～102.25 %。将实验方法应用于标准物质的测定,测定值与认定值基本一致。方法的准确度和精密度均能满足分析需要,具有较强的实用性。

Determination of Tin in Core Samples by Hydride Generation-Atomic Fluorescence Spectrometry

A method has been established for the determination of tin in core samples by hydride generation-atomic fluorescence spectrometry.Samples were melted by sodium peroxide molten method,then leached with hot water and acidified with hydrochoric acid. The instrument conditiongs were optimized,the effect of potassium borohydride,acidity,coexistent elements on the determination of tin was investigated.The relative standard deviations were between 2.52 % and 7.28 %,the recoveries of standard addition were between 95.20 % and 102.25 %.The certified reference materials were determined by the experimental method,and the results were basically consistent with the certified values.The accuracy and precision of results meet the demands,and the method is practical.