便携式X荧光仪测定铅黄铜合金中主元素的研究应用  

The Research and Application of Using the Portable X Ray Fluorescence Spectrometer to Determine the Main Elements of Lead Brass Alloy

作　　者：谢希成[1] 赖万昌[1] 李军[1] 吴和喜[1] 

机构地区：[1]成都理工大学,成都610059

出　　处：《核电子学与探测技术》2014年第6期689-693,共5页Nuclear Electronics & Detection Technology

基　　金："863"计划项目"高精度手提式X荧光仪研发"(2012AA06180301)资助

摘　　要：讨论了便携式能量色散X荧光仪在测量铜合金中主元素的研究应用中[1],便携式能量色散X荧光仪测量铜合金中主量元素的最佳条件。通过实验研究证明,在测量运用中采用0.2 mm纯Al的滤片能够大大改善原级谱低能射线产生的本底,过滤效果良好。当X光管管压和管流分别选择22 k V和8μA时可获得最佳峰背比,得到最佳激发电压和管电流。此外,针对经验系数法和基本参数法各自缺陷,利用经验系数法计算出基本参数法中的荧光相对强度和迭代所需的首次元素含量值后代入到基本参数法的流程中进行迭代。实验结果表明,应用此法进行定量分析Cu、Zn、Pb的平均相对误差1.04%、3.3%、6.22%,可见该方法能得到较好的定量结果。The experiment uses the IED-2000T portable X ray fluorescence spectrometer.Digital probe IED-2000 T portable X-ray fluorescence spectrometer consists of the host and separable components,probe and the host using Bluetooth communication,measuring results can be stored in real-time on the host.This design,can avoid the inconvenience caused by cable to connect the mobile host,or cable connection is interrupted data loss.This paper mainly discusses the application of portable energy dispersive X ray fluorescence analyzer in the measurements of the copper alloy,discussed in the practical application of the process rather than the laboratory conditions,the optimum conditions of main portable energy dispersive X ray fluorescence measurement of copper alloy element.In the light tube window,a 0.2 mm aluminum filter is added,measurements at different voltage and current and the different conditions of the samples are conducted.According to the measured peak to background ratio the best elements excited pipe pressure and flow is determined.Through the experiments,the filter of a 0.2 mm pure Al can greatly improve the primary spectrum.The X light tube which can obtain the best peak to background ratio are with the setting at 22 k V and 8μA respectively.Application study in the determination of the main elements of lead brass alloy in the use of portable X fluorescence analyzer shows that,using the experience coefficient method to calculate the relative strength is needed in the first element content value determination,and the fundamental parameter method process can be used in the following iterations.The experimental results show that,using this method for quantitative analysis of Cu,Zn,Pb,the average relative error of 1.04%,3.3%,6.22%,can be obtained.

关 键 词：X荧光 铅黄铜合金 滤光片 最佳峰背比 经验系数-基本参数法定量 定量分析 

分 类 号：TL8[核科学技术—核技术及应用]