Choosing optimal exposure times for XRF core‐scanning: Suggestions based on the analysis of geological reference materials
作者： Jyh-Jaan Huang , Ludvig Löwemark , Queenie Chang , Tzu-Yu Lin , Huei-Fen Chen
DOI: 10.1002/2016GC006256
关键词: X-ray fluorescence 、 Linear regression 、 Mineralogy 、 Total measurement 、 Core (optical fiber) 、 Geology 、 Volume concentration 、 Scanner
摘要: X-ray fluorescence (XRF) core-scanning is a fast and nondestructive technique to assess elemental variations of unprocessed sediments. However, although the exposure time XRF-scanning directly affects scanning counts total measurement time, only few studies have considered influence during scan. How select an optimal achieve reliable results reduce important issue. To address this question, six geological reference materials from Geological Survey Japan (JLK-1, JMS-1, JMS-2, JSD-1, JSD-2, JSD-3) were scanned by Itrax-XRF core scanner using Mo- Cr-tube with different times allow comparison absolute concentrations. The regression lines correlation coefficients elements that are generally used in paleoenvironmental examined for tubes. show those relatively high concentrations or detectability, higher than 0.90 all times. In contrast, low detectability concentration elements, low, improve little increased time. Therefore, we suggest insignificant accuracy measurements. Thus, caution must be taken when interpreting even long reasonably high.
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