Apollo-17 mare basalt (70017-291) was quantitatively analyzed for Ca, Ti, Cr,In, Fe, etc. by proton-exciting X-ray analysis technique. A comparison of the analytical results with those determined on Apollo-11 and Apol...Apollo-17 mare basalt (70017-291) was quantitatively analyzed for Ca, Ti, Cr,In, Fe, etc. by proton-exciting X-ray analysis technique. A comparison of the analytical results with those determined on Apollo-11 and Apollo-12 mare basalt samples.展开更多
The preparation of the human hair reference material and the steps taken to confirm its homogeneity and stability as well as its certificatipn are described. Certified values for 17 elements, which are of importance f...The preparation of the human hair reference material and the steps taken to confirm its homogeneity and stability as well as its certificatipn are described. Certified values for 17 elements, which are of importance for human health, and reference values for the other 13 elements are provided for this material.展开更多
This paper deals with the matrix absorption and enhancement effects of thick targets in energy dispersive X-ray fluorescence analysis. Two kinds of absorption correction methods are studied especially for medium thick...This paper deals with the matrix absorption and enhancement effects of thick targets in energy dispersive X-ray fluorescence analysis. Two kinds of absorption correction methods are studied especially for medium thick targets (5-10 mg/cm2). For analysis of hair samples, both the measurement of absorption correction coefficients and the determination of sensitivity factors using an addition method are introduced. Quantitative analysis of medial thick samples is established. The relative deviation between different methods for most of the elements is found to be less than 5 %.展开更多
文摘Apollo-17 mare basalt (70017-291) was quantitatively analyzed for Ca, Ti, Cr,In, Fe, etc. by proton-exciting X-ray analysis technique. A comparison of the analytical results with those determined on Apollo-11 and Apollo-12 mare basalt samples.
基金The Project Supported by National Natural Science Foundation of China
文摘The preparation of the human hair reference material and the steps taken to confirm its homogeneity and stability as well as its certificatipn are described. Certified values for 17 elements, which are of importance for human health, and reference values for the other 13 elements are provided for this material.
文摘This paper deals with the matrix absorption and enhancement effects of thick targets in energy dispersive X-ray fluorescence analysis. Two kinds of absorption correction methods are studied especially for medium thick targets (5-10 mg/cm2). For analysis of hair samples, both the measurement of absorption correction coefficients and the determination of sensitivity factors using an addition method are introduced. Quantitative analysis of medial thick samples is established. The relative deviation between different methods for most of the elements is found to be less than 5 %.
