Probes for a gas phase ion spectrometer
First Claim
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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Accused Products
Abstract
The invention provides a probe and a method of making the probe that is removably insertable into a gas phase ion spectrometer, the probe comprising a substrate having a surface and a hydrogel material on the surface, the hydrogel material comprising binding functionalities for binding with an analyte detectable by the gas phase ion spectrometer. The invention also provides a probe and a method of making the probe that is removably insertable into a gas phase ion spectrometer, the probe comprising a substrate having a surface and a plurality of particles that are uniform in diameter on the surface, the particles comprising binding functionalities for binding with an analyte detectable by the gas phase ion spectrometer. Further, the invention provides a system comprising the probe of the present invention and a gas phase ion spectrometer comprising an energy source that directs light to the probe surface to desorb an analyte and a detector in communication with the probe surface that detects the desorbed analyte. The invention also provides a method for desorbing an analyte from a probe surface, the method comprising exposing the binding functionalities to a sample containing an analyte under conditions to allow binding between the analyte and the binding functionalities, and desorbing the analyte from the probe by gas phase ion spectrometry.
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Citations
31 Claims
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1. A method for detecting an analyte comprising:
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(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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31)
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Specification