APPARATUS AND METHOD FOR RAPID CHEMICAL ANALYSIS USING DIFFERENTIAL DESORPTION
First Claim
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1. A device comprising:
- (a) a wand including a mesh screen;
(b) a sensor, where the sensor detects contact between the wand in a first target area on the mesh screen and a sample;
(c) a desorption ionization source adapted to direct a stream of energetic particles towards the first target area, where the stream of energetic particles interacting with the first target area generates a plurality of sample ions; and
(d) an analyzer adapted to analyze one or more of the plurality of sample ions.
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Abstract
The present invention is directed to a method and device to generate a chemical signature for a mixture of analytes. The present invention involves using a SPME surface to one or both absorb and adsorb the mixture of analytes. In an embodiment of the invention, the surface is then exposed to different temperature ionizing species chosen with appropriate spatial resolution to desorb a chemical signature for the mixture of analytes.
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20 Claims
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1. A device comprising:
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(a) a wand including a mesh screen; (b) a sensor, where the sensor detects contact between the wand in a first target area on the mesh screen and a sample; (c) a desorption ionization source adapted to direct a stream of energetic particles towards the first target area, where the stream of energetic particles interacting with the first target area generates a plurality of sample ions; and (d) an analyzer adapted to analyze one or more of the plurality of sample ions. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 20)
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11. A device comprising:
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(a) a wand including a mesh screen comprising a fiber; (b) a sensor, where the sensor detects contact between the fiber and a sample; (c) a desorption ionization source adapted to direct a stream of energetic particles towards the fiber, where the stream of energetic particles interacting with the fiber generates a plurality of sample ions; and (e) an analyzer, adapted to analyze one or more of the plurality of sample ions. - View Dependent Claims (12, 13, 14)
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15. A device comprising:
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(a) a wand including a mesh screen comprising a first fiber and a second fiber where the first fiber is in close proximity to the second fiber; (b) a sensor, where the sensor detects physical contact between the wand and a sample in at least the first fiber or the second fiber; (c) a desorption ionization source adapted to direct a stream of energetic particles towards the first fiber and/or the second fiber, where the stream of energetic particles interacting with one or both the first fiber and the second fiber generates a plurality of sample ions; and (e) an analyzer, adapted to analyze one or more of the plurality of sample ions. - View Dependent Claims (16, 17, 18, 19)
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Specification