Kunimura Shinsuke, Shinkai Tomoki
Department of Industrial Chemistry, Faculty of Engineering, Tokyo University of Science.
Anal Sci. 2017;33(5):635-638. doi: 10.2116/analsci.33.635.
Using a portable total-reflection X-ray fluorescence (TXRF) spectrometer with a collodion film sample holder, a spectrum of an analyte containing 50 ng of aluminum was measured. The Al Kα line (1.49 keV) that partially overlaps with the Si Kα line (1.74 keV) from a quartz glass substrate usually used as a sample holder for TXRF analysis, was clearly detected when using the collodion film sample holder. To investigate the quantitative performance of the portable spectrometer with a collodion film sample holder, the concentrations of Cr, Mn, and Fe in a certified reference material of river water (JSAC 0302-3b), whose certified values are 10.0, 5.1, and 59.6 μg/L, respectively, were determined by the internal-standard method. We showed that approximate concentrations of these elements were determined.
使用带有火棉胶薄膜样品架的便携式全反射X射线荧光（TXRF）光谱仪，测量了含有50 ng铝的分析物的光谱。当使用火棉胶薄膜样品架时，可以清晰地检测到Al Kα线（1.49 keV），它与通常用作TXRF分析样品架的石英玻璃基板的Si Kα线（1.74 keV）部分重叠。为了研究带有火棉胶薄膜样品架的便携式光谱仪的定量性能，采用内标法测定了河水标准参考物质（JSAC 0302-3b）中Cr、Mn和Fe的浓度，其认证值分别为10.0、5.1和59.6 μg/L。我们表明可以测定这些元素的近似浓度。
