Abstract
The speciation of polar silicon compounds by high performance liquid chromatography using both radially viewed and axially viewed inductively coupled plasma (ICP) atomic emission spectrometers, with solid state detection, is described. Optimum operating conditions for the direct aspiration of an organic mobile phase were evaluated for the two modes of viewing and limits of detection, background equivalent concentrations and relative standard deviations of the blank were calculated to compare radially viewed and axially viewed ICPs directly. It was found that no appreciable improvements in detection limits were observed when viewing the plasma axially. This is attributed to the fact that the plasma noise cannot be eliminated for `end on' viewing through the entire optical path length. Various methods for data acquisition are also described.
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