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Probes for a gas phase ion spectrometer

  • US 7,205,156 B2
  • Filed: 10/06/2004
  • Issued: 04/17/2007
  • Est. Priority Date: 04/27/1999
  • Status: Expired due to Term
First Claim
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1. A method for detecting an analyte comprising:

  • (a) providing a probe comprising a substrate having a surface and a hydrogel material on the surface, wherein the hydrogel material comprises a water-insoluble and water-swellable polymer, having absorbed at least 10 times its own weight of a liquid, that is crosslinked and is at least about 10 microns thick and further comprises binding functionalities for binding with an analyte;

    (b) exposing the binding functionalities of the hydrogel material to a sample containing an analyte under conditions to allow binding between the analyte and the binding functionalities of the hydrogel material;

    (c) striking the probe surface with energy from an ionization source, thereby desorbing and ionizing the analyte;

    (d) detecting the desorbed and ionized analyte by mass spectrometry.

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