波长色散-X射线荧光光谱法测定地质样品中卤族元素  

Determination of Halogen Elements in Geological Samples by Wavelength Dispersive X-ray Fluorescence Spectrometry

作　　者：张兵兵 张锦涛 吕胜男 杨园 赵文志 Zhang Bingbing;Zhang Jintao;Lv Shengnan;Yang Yuan;Zhao Wenzhi(Center for Harbin Natural Resources Comprehensive Survey,China Geological Survey,Harbin 150039,China)

机构地区：[1]中国地质调查局哈尔滨自然资源综合调查中心,黑龙江哈尔滨150039

出　　处：《广东化工》2022年第1期164-166,共3页Guangdong Chemical Industry

基　　金：中国地质调查局项目(DD20208069)。

摘　　要：本文采用粉末直接压片制样,波长色散X射线荧光光谱法对地质样品中的卤族元素(F、Cl、Br)进行同时测定。通过标准物质建立工作曲线,采用经验系数法、背景内标法和Rh Kα康普顿散射内标法校正F、Cl和Br的基体效应和谱线干扰。确认了Mo Lγ1对Cl Kα,As Kβ对Br Kα存在谱线干扰,本方法测定标准物质中Cl和Br的相对误差(RE)均小于7%,F相对误差均小于12%,F、Cl和Br的精密度(RSD)均小于6%,并与氟离子计、元素分析仪和离子色谱仪的测试结果进行比较,准确度、精密度和检出限符合DZ/T0258-2014《多目标区域地球化学调查规范(1︰250000)》要求。具有操作简便、准确度高、成本低的特点,同时通过实际工作验证,本方法适用于测定大批量的地质样品。In this paper, the samples were prepared in the form of pellets, determination of the halogen elements(F, Cl, Br) in geological samples by wavelength dispersive X-ray fluorescence spectrometry. Selected standard materials to establish calibration curve. The empirical coefficient method, the background internal standard method and the Rh Kα Compton scattering internal standard method were used to correct the matrix effects and spectral line interference of F, Cl, and Br. It was confirmed that Mo Lγ1 line overlaps with Cl Kα line, As Kβ line overlaps with Br Kα line. The relative errors(RE) of this method for the determination of Cl and Br in national standard materials were all less than 7 % and F was all less than 12 %, and the precision(RSD)of F, Cl and Br was less than 6 %, and compared with the test results of fluoride ion meter, element analyzer and ion chromatograph. The limit, accuracy and precision meet the requirements of the national geological industry standard(DZ/T0258-2014 “Specifications for multi-target regional geochemical survey(1︰250000)”). It has the characteristics of simple operation, high accuracy and low cost. At the same time, it is verified by actual work that this method is suitable for the determination of large quantities of geological samples.

关 键 词：粉末压片 X射线荧光光谱法 地质样品 卤族元素 

分 类 号：TQ[化学工程]