2 RADIOMETRIC METHODS FOR FAST DETERMINATION OF CALCIUM IN CEMENT RAW MIX

被引:9
作者
LUBECKI, A
WASILEWS.M
机构
[1] Institute of Nuclear Technique, Academy of Mining and Metallurgy, Cracow
来源
JOURNAL OF RADIOANALYTICAL CHEMISTRY | 1968年 / 1卷 / 01期
关键词
D O I
10.1007/BF02513579
中图分类号
O65 [分析化学];
学科分类号
070302 ; 081704 ;
摘要
Fast determination of calcium in cement raw mix is a very important problem from the economic point of view. In order to solve this task, the following two methods are proposed: (i) Non-dispersive X-ray fluorescence analysis (using109Cd as a source of primary radiation); (ii) back-scattering of β-particles (using90Sr+90Y as a source). The influence of the following factors has been studied in both methods: (i) concentration of iron in the matrix; (ii) water content; (iii) grain size of the sample. The influence of the energy of the primary radiation on the slope of a calibration curve has been analyzed in the fluorescence method. In the concentration range of 42-52% CaO, the absolute standard error is 0.17% CaO in the fluorescence analysis, and 0.5% CaO for the method of back-scattering of β-particles. The average time of a determination is about 2 min. © 1968 Akadémiai Kiadó.
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页码:25 / &
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