【摘要】 本文讨论了在能量色散X射线荧光分析中影响准确定量的厚靶基体吸收效应,着重研究了中厚靶的吸收校正方法。以头发样品为例,分别介绍了采用辐射体测得吸收校正系数和化学加入法测得经校正后的相对灵敏度等方法,建立了正确分析中厚靶样品的定量方法和计算程序。比较各种修正方法之间的一致性好于5％。更多还原

【Abstract】 This paper describes matrix absorption enhancement effects of the thick target in energy dispersive X-ray fluorescence analysis (XRF). Absorption correction methods (5-10mg/cm2) are studied especially for medium thick target. For analysis of hair sample, both the measurement of absorption correction coefficients and the determination of sensitivity factor using addition method are introduced. Quantitative analysis and computer program of medium thick samples are established. The relative deviation between different methods for most elements is found to be less than 5%.更多还原