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A technique for Inductively coupled plasma (ICP) sample introduction Is presented by which certain metals are converted to volatile /3-dlketonales and the resulting metal-chelate vapor Is carried by argon Into a stabilized Inductively coupled argon plasma. The feasibility of directly reacting /3-diketone ligands and certain metals with minimal sample preparation Is discussed with qualitative data supporting the direct chelation reaction of Fe, Zn, Co, Mn, and Cr In various matrices (l.e., pure metal, National Bureau of Standards (NBS) bovine liver, human blood serum). Quantitative data for the determinations of Fe, Zn, and Cr In bovine liver and In blood serum are presented and compared with values obtained by alternative analytical methods. Advantages and limitations of this technique over existing means of ICP sample introduction are discussed.

Comparisons are made of two techniques for the trace analysis of volatile organic compound (VOC) emissions from consumer products: direct on-line sampling and analysis and on-line solid sorbent collection followed by off-line analysis. Two types of direct analyses are examined. The first consists of direct injection of emissions from a sample loaded environmental chamber into a gas chromatograph equipped with a flame ionization detector (FID) for compound identification. Direct injection of headspace collected emissions into a gas chromatograph equipped with a mass selective detector is the second direct method scrutinized. The more traditional technique of solid sorbent collection of the volatile organic emissions followed by thermal desorption (TD)/gas chromatographic (GC)/mass spectrometric (MS) analysis is compared to both direct on-line methods.