X射线荧光光谱仪滤光片故障解决思路探讨

Discussion on Solution of Filter Failure of X-ray Fluorescence Spectrometer

波长色散X射线荧光光谱仪在土壤、沉积物等环境样品测试中应用广泛,样品制备以粉末压片为主。为探索解决粉末压片法硼酸挥发造成的光谱仪滤光片故障的问题,经改装样品前处理装置压片机结构,采用塑料环直接压片的方式,解决了滤过片故障。压片机改装为塑料环压片方式后有证标准物质的测定值符合方法准确度和精密度要求,实际样品测定值和改装前数据相比,标准偏差在5%以内,稳定性较好。为同行在仪器使用中解决类似问题提供思路参考。

Wavelength dispersive X-ray fluorescence spectrometer is widely used in the determination of environmental samples such as soil and sediment.The sample preparation is mainly powder tablet.In order to solve the problem of spectrometer filter failure caused by boric acid volatilization in powder pressing method,the structure of sample pretreatment device tablet pressing machine was modified,and the method of plastic ring direct tablet pressing was adopted to solve the filter failure.After the tablet press was modified to plastic ring tablet press,the measured value of certified reference material met the accuracy and precision requirements of the method.Compared with the measured values of actual samples before modification,the standard deviation of the measured value of the actual sample was within 5%,indicating good stability.It provides an idea reference for peers to solve similar problems in the use of instruments.