電熱気化法によるICP-MSへのサブマイクロリットル溶液試料の導入

概要

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In inductively coupled plasma mass spectrometry (ICP-MS), an electrothermal vaporization technique with a tungsten filament (WF-ETV) was applied in order to analyze submicro-liter samples. A 0.5-l volume of sample solution was successfully introduced into the plasma of ICP-MS by using a -shaped WF instead of a loop-shaped one. Measurement conditions such as integration time of signals and charging voltage for a capacitor were optimized to give the maximum signal intensities. Absolute detection limits of several tens of femto-gram (fg) for Co and Pb were obtained, although further examinations in reproducibility and multi-element determination are required for the practical application of the proposed method.
2010-06-30