In vivo time-resolved X-ray fluorescence mapping measurements of Egeria densa immersed in Cr(VI) aqueous solution
作者： Hisashi Hayashi
DOI: 10.1002/XRS.2552
关键词:
摘要: In vivo time-resolved Cr and Ca X-ray fluorescence (XRF) mapping measurements were performed in a laboratory over period of 69 days on living common aquatic plant Egeria densa that was immersed 5 mM K2CrO4 aqueous solution. The time spatial resolution for each XRF map ~1.6 days 1 × 1 mm2, respectively. obtained maps exhibited characteristic localized areas where the signals especially strong (‘hot spots’), this indicated necessity preliminary millimeter-resolution surveying microscopy. hot spots detected prior to Cr(VI) immersion nearly disappeared after deionized water 2 weeks solution 1 week. After these immersions, spot formed at approximately same location missing spot, which suggests original Ca-accumulated regions substituted isolation species when they introduced. sizes intensity distributions sensitive exposure 1 week measurement. This sensitivity potential applications E. densa as biomonitor environments. Copyright © 2014 John Wiley & Sons, Ltd.
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