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虽然X射线荧光光谱分析是一种样品无损的分析方法,但是它必需要求样品的表面有一个较大面积的光滑平面,并且需要大量的标样。对于一些特殊样品,如古代钱币,在无损的情况下,样品表面要得到一个较大面积的光滑平面是不可能的,而且要解决一套理想的标样也是不可能的,其它考古样品也是如此。本文提出了一个新的测试途径,即采用在小面积光滑平面上测量X射线强度和用基本参数法理论计算浓度相结合,此法可以讲是无损的,并且只需要一个或几个标样,我们用此法测定了一批唐宋时期的古代铜钱中的Pb、Cu、Sn,结果是能满足要求的,这样既保持了文物的原样,又得到了分析的结果。
Although X-ray fluorescence spectrometry is a nondestructive analysis of samples, it must require a large, smooth surface on the sample surface and requires a large number of standards. For some special samples, such as ancient coins, it is impossible to obtain a smooth surface with a large area under the condition of no damage, and it is impossible to solve a set of ideal standard samples as well as other archeological samples . This paper presents a new test approach that combines the use of X-ray intensities measured on a small area of smooth surface with the theoretical calculations of concentration using the basic parameter method, which is nondestructive and requires only one or a few standards, We use this method to measure a group of ancient copper coins in the Tang and Song Dynasties of Pb, Cu, Sn, the result is to meet the requirements, so that both the remains of the original artifacts, but also the results of the analysis.