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Rapid analysis of beta-phenylethylamine in tissues and body fluids utilizing pentafluorobenzoylation followed by electron-capture gas chromatography.

A rapid, sensitive gas chromatographic procedure for analysis of beta-phenylethylamine is reported. The procedure involves extraction with a liquid ion-pairing compound, back-extraction with HCl, basification and reaction with pentafluorobenzoyl chloride under aqueous conditions. The pentafluorobenzoyl derivative of beta-phenylethylamine is then separated and analyzed on a gas chromatograph equipped with a capillary column and an electron-capture detector. The procedure produces a derivative which has good chromatographic properties and a high degree of stability. The method has been applied to analysis of beta-phenylethylamine in a variety of tissues and body fluids.