我们研制成功一种复合元素滤光片，在XRF浸入式探头中安装它以后，便能够测定以两种邻近的高含量元素（被测元素的X射线能量高于干扰元素的X射线能量）为主体的矿样。本文介绍用于复合滤光片的元素及其质量厚度的选用原则，滤光片的研制和性能、调整方法以及它的应用效果。

A composite element filter of absorption edge type described here can be used when the X-ray energy of the wanted element is higher then that of the interference element. It's mainly used in immersion probes. When measuring copper in copper concentrate

the absolute error of the grade achieved is mostly less than ±0.3% and this can fully meet the demand of industrial process control analysis. It can be anticipated that in other pulp on-stream analysis

a relative composite element filter can certainly be made if the content of the neighboring element is high enough and the X-ray energy of the element to be measured is higher than that of the interference element.

Preparation of Ni-Cr composite powder

the blending ratio test of the two element

the mass thickness test at the given blending ratio

the modulation and testing of the filter performance and test measurement on the sample of natural powder are given.