An ion source able to ionize both liquid and gaseous effluents from interfaced liquid or gaseous separation techniques. The liquid effluents are ionized by electrospray ionization, photoionization or atmospheric pressure chemical ionization and the gaseous effluents from sources such as a gas chromatograph are ionized by a corona or Townsend electrical discharge or photoionization. The source has the ability to ionize compounds from both liquid and gaseous sources, which facilitates ionization of volatile compounds separated by gas chromatography, low volatility compounds separated by liquid chromatography, as well as highly non-volatile compounds infused by electrospray or separated by liquid chromatography or capillary electrophoresis.

 
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