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The application of inductively coupled plasma optical emission spectrometry (ICP-OES) to the elemental analysis of organic compounds is evaluated successfully for seven nonmetallic elements. A comparison of this method with previously reported microwave techniques shows that, while both methods are sensitive (detection limits in the low nanogram region), ICP-OES has fewer complications and appears to be less prone to interferences than the analogous microwave techniques. The results of these studies suggest that ICP-OES should be applicable to the simultaneous multielement analysis of the gaseous effluents from a gas chromatograph.

Studies are presented describing an improved application of the NaBH4 reduction of soluble arsenite to form arsine as a preconcentration approach for ultra-trace level arsenic determination by inductively coupled plasma optical emission spectrometry. Specialized analyte introduction techniques are described for elimination of reaction by-products that would normally extinguish a medium power plasma discharge. An approach is presented to minimize the need for background correction and facilitate a superior arsenic detection limit (≤0.03 ng/ml) in a relatively inexpensive 1.2 kW inductively coupled plasma system.

The ability of the inductively-coupled plasma (ICP) gas chromatographic (GC) detector to determine empirical formulas is evaluated. Elemental compositions and empirical formulas of hydrocarbons and halogens are determined as the compounds are eluted from a chromatograph. The observed

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