便携式X荧光仪关键技术研究  

RESEARCH ON KEY TECHNIQUES IN PORTABLE XRF ANALYZERS

作　　者：李国栋[1] 贾文懿[1] 周蓉生[1] 唐红[1] 

机构地区：[1]成都理工学院四川省地学核技术重点实验室

出　　处：《原子能科学技术》1999年第1期61-65,共5页Atomic Energy Science and Technology

摘　　要：针对现行便携式Ｘ荧光仪灵敏度低、检出限差、测定元素少、基体效应校正能力弱等问题，对激发源、探测与测量系统、微机化等关键技术进行了研究。研制了微型低功率Ｘ光管激发源、低功耗１０２４道分析器，实现了以笔记本式微型计算机系统为核心的微机化，构成了高灵敏度便携式Ｘ荧光仪。它可测定多种元素，较轻和中等原子序数元素的检出限达到几至十几μｇ／ｇ，比现行便携式Ｘ荧光仪改善１个量级以上，基体效应校正和数据处理功能大为增强。Focused on the problems of low sensitivity,poor detection limits, small number of determined elements and poor ability of matrix effect correction of the current field portable X ray fluorescence (XRF) analyzers, research work on key units of excitation source, detector, measurement circuit and microcomputerization is carried out. A miniature, low power X ray tube excitation source is developed.A low dissipative 1024 channel analyzer, fitting to high resolution detectors, is prepared. Microcomputerization based on a notebook computer is realized. On the basis, a field, highly sensitive XRF system is constituted. With this system, multielements can be determined with the detection limits of less than 20 μg/g for the elements with medium or lower atomic numbers, one order of magnitude or more lower than those of the current portable XRF analyzers. The capabilities for matrix effect correction and data processing are enhanced. This system gets rid of radionuclide sources, making its use and carry safe and convenient.

关 键 词：X荧光仪 便携式 高灵敏度 关键技术 地球化学 

分 类 号：TH763.3[机械工程—仪器科学与技术]