固相分光法の開発とその超微量成分流れ分析への応用

概要

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The applicability of solid-phase spectrometry to flow analysis has been studied for the sensitive determination of target trace elements in natural-water samples. By a fundamental study involving light measurements, it has been confirmed that Beer's law can be applied to around the 4 to 5 absorbance scale in a solid particle layer system. Lambert's law was also confirmed up to a cell length of 4 cm if the Pt tube cell was used. On the basis of obtained data, a flow-through cell packed with fine spherical beads has been tested as a detector in flow-analysis systems for the sensitive determination of some elements such as cobalt(II), chromium, copper(II), molybdenum (VI) and vanadium as well as some rare earth elements and aluminium. By only using a few cm^3 of the sample solution, the proposed method enabled us to determine the target chemical species present at gg dm^<-3> or lower levels in 3-6 samples in less than 1 hour. By a practical application of the proposed method to natural-water analysis, some significant information, unavailable by other determination methods, could be obtained: for example, details on the oxidation states of chromium present at sub-μg dm^<-3> levels in natural water.
社団法人日本分析化学会の論文
1999-11-05