氢化物发生-原子荧光光谱法测定岩芯中锡的含量

Determination of Tin in Cores by Hydride Generation-Atomic Fluorescence Spectrometry

建立了氢化物发生-原子荧光光谱法测定岩芯中锡的方法。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2.5%~7.3%,加标回收率95.2%~102%。将实验方法应用于标准物质的测定,测定值与认定值相吻合。方法用于测定岩芯中锡,结果满意。

A method for the determination of tin in cores by hydride generation-atomic fluorescence spectrometry has been developed.Samples were melted by sodium peroxide molten method,then leached with hot water and acidified with hydrochloric acid.The instrument conditions were optimized,the effect of potassium borohydride,acidity,coexistent elements on the determination of tin was investigated.The relative standard deviations were between 2.5%and 7.3%,the recoveries of standard addition were between 95.2%and 102%.The certified reference materials were determined by the experimental method,and the results were consistent with the certified values.The method has been applied to determination of tin in cores with satisfactory results.