国产石英反射体应用于全反射X射线荧光光谱分析中的性能评价  

Performance evaluation of home-made quartz reflector applied in total reflection X-ray fluorescence spectrometric analysis

作　　者：刘晓[1] 储彬彬[1] 詹秀春[1] LIU Xiao;CHU Binbin;ZHAN Xiuchun(National Research Center for Geoanalysis,Beijing 100037,China)

机构地区：[1]国家地质实验测试中心,北京100037

出　　处：《冶金分析》2021年第8期1-6,共6页Metallurgical Analysis

基　　金：国家重点研发计划项目(2016YFC0600605);基本科研业务费项目(300025000002043310)。

摘　　要：石英反射体是全反射X射线荧光光谱(TXRF)分析常用的样品载体。目前TXRF商用石英反射体均为进口产品,单价过高,成批购置时成本往往难以承受。为此,项目组优选国内加工单位,指定技术参数,定制了一批国产石英反射体,单价仅为进口产品的1/15以下。为考察两种石英反射体的性能差异,在相同条件下,利用TXRF对国产和进口两种空白石英反射体进行测试,通过对比两种反射体的不同元素感兴趣区(光谱背景(BG)、Si、Ar、Mo)、多种元素(V、Cr、Mn、Co、Ni、Cu、Zn、As、Sr、Ba、Pb、Bi)的仪器检出限,考察评价两种石英反射体的材质纯度、平整度、厚度等物理性能的差异;分别采用国产和进口石英反射体,对5种不同质量浓度的混合标准溶液进行TXRF测试,通过对比两种反射体得到的多种元素的灵敏度与测量值,考察评价两种石英反射体使用性能的差异。实验结果表明,两种石英反射体得到的各项结果几乎相同,证明了国产石英反射体的性能指标与进口产品非常相近,完全可以代替进口石英反射体。采用国产石英反射体,可以大大降低成本,方便野外现场的样品分析。Quartz reflector is commonly used as sample carrier in total reflection X-ray fluorescence(TXRF)spectroscopy analysis.At present,the commercial quartz reflectors of TXRF are all imported products,and the batch purchase cost is often unbearable as the unit price is too high.Therefore,our project team screened several domestic manufacturers and appointed them to customize a batch of home-made quartz reflectors with the specified technical parameters.The unit price was even lower than 1/15 of the imported products.In order to investigate the performance difference between home-made and imported products,two kinds of quartz reflectors were employed for measurement by TXRF under the same conditions.By comparing the regions of interest(spectral background(BG),Si,Ar and Mo)and the limits of detection of different elements(V,Cr,Mn,Co,Ni,Cu,Zn,As,Sr,Ba,Pb and Bi),the differences of physical properties such as material purity,flatness and thickness of two kinds of quartz reflectors were investigated and evaluated.Five mixed standard solutions with different mass concentrations were tested by TXRF using the home-made and imported quartz reflectors.By comparing the sensitivity and measured values of different elements obtained by two reflectors,the differences in usage performance were investigated and evaluated.The experimental results showed that the measurements results obtained by two kinds of quartz reflectors were almost the same,which proved that the performance index of home-made quartz reflectors had been very similar to that of imported quartz reflectors.The home-made quartz reflectors could completely replace the imported ones.The use of home-made quartz reflectors could greatly reduce the cost and facilitate the field sample analysis.

关 键 词：全反射X射线荧光光谱(TXRF) 石英反射体 国产 进口 性能评价 

分 类 号：O657.34[理学—分析化学]