Abstract

The use of a microarc atomizer as a device for microsample introduction into the inductively coupled plasma (ICP) is described. The microarc, a high-voltage, low-current, pulsating dc discharge, efficiently vaporizes desolvated, discrete microvolumes of sample solution into the plasma. The microarc-ICP combination exhibits relative detection limits and working curves comparable to those of other methods of sample introduction but functions with sample volumes in the 0.5 to 1.0 μl range. Matrix and ionization interference effects are absent or trivially overcome. Computer control of the instrument adds simplicity of operation.

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