【摘要】 <正> 感耦等离子体发射光谱法（ICP-AES）在土壤、地质和环境样品的分析中已有广泛应用。由于直读ICP光谱仪有很好的测量精度,因此常量元素分析的精度和准确度在很大程度上取决于样品的化学前处理,我们用HCIO₄-HNO₃-HF混酸分解沉积物样品,几种常量元素测定的变异系数小于2％,本工作用这种方法分解取自西藏的土壤标准参考样品,七种常量元素的测定结果均很好地满足标样元素定值要求。影响微量元素准确测定的因素较多,基体元素的干扰是主要因素之一。本工作在原有工作的基础上,进一步研究了样品中主要基体元素对微量元素测定的光谱干扰,讨论了利用元素间干扰系数法进行光谱干扰修正所遇到的一些问题。更多还原

【Abstract】 Spectral interfernces of matrix elements Al, Fe, Ca, Mg and Ti in soil and sediment analysis have been investigated with the“polychromator scan”software of a Baird ICP system, The results obtained indicate that spectral line overlap interfernces are chiefly from Fe and Ti, and background shift interfernces are from Al, Mg and Ti. Interelement interfernce ratios were determined and used to correct the spectral interferences. It was found that interference ratios of Mg varied with its concentration, so it was important to choose an appropriate concentration for determining interference ratios. A method for the determination of 24 major, minor and trace elements in soil. and sediment has been developed and satisfactory results have been obtained.更多还原