Non-planar chemical preconcentrator
AssigneeSandia Corporation
InventorsRonald P. Manginell, Douglas R. Adkins, Sara S. Sokolowski, Patrick R. Lewis
Life of this patent
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Abstract
A non-planar chemical preconcentrator comprises a high-surface area, low mass, three-dimensional, flow-through sorption support structure that can be coated or packed with a sorptive material. The sorptive material can collect and concentrate a chemical analyte from a fluid stream and rapidly release it as a very narrow temporal plug for improved separations in a microanalytical system. The non-planar chemical preconcentrator retains most of the thermal and fabrication benefits of a planar preconcentrator, but has improved ruggedness and uptake, while reducing sorptive coating concerns and extending the range of collectible analytes.
Claims52
A non-planar chemical preconcentrator, comprising:
- a substrate having a suspended membrane formed thereon with at least one hole formed in the suspended membrane for flow of a sample fluid therethrough,
- at least one resistive heating element disposed on a surface of the suspended membrane,
- a sorption support structure disposed on a surface of the membrane, and
- a sorptive material disposed on the sorption support structure to sorb and concentrate at least one chemical species from the sample fluid, with the chemical species being releasable from the sorptive material upon heating of the sorptive material by the at least one resistive heating element.
A non-planar chemical preconcentrator, comprising:
- a substrate having a suspended membrane formed thereon,
- at least one resistive heating element disposed on a surface of the suspended membrane,
- a sorption support structure comprising a plurality of concentric hollow cylinders disposed on a surface of the membrane, and
- a sorptive material disposed on the sorption support structure to sorb and concentrate at least one chemical species from a sample fluid, with the chemical species being releasable from the sorptive material upon heating of the sorptive material by the at least one resistive heating element.
A non-planar chemical preconcentrator, comprising:
- a substrate having a suspended membrane formed thereon,
- at least one resistive heating element disposed on a surface of the suspended membrane,
- a sorption support structure comprising a plurality of fins disposed on a surface of the membrane, and
- a sorptive material disposed on the sorption support structure to sorb and concentrate at least one chemical species from a sample fluid, with the chemical species being releasable from the sorptive material upon heating of the sorptive material by the at least one resistive heating element.
A non-planar chemical preconcentrator, comprising:
- a substrate having a suspended membrane formed thereon,
- at least one resistive heating element disposed on a surface of the suspended membrane,
- a sorption support structure comprising a plurality of posts disposed on a surface of the membrane, and
- a sorptive material disposed on the sorption support structure to sorb and concentrate at least one chemical species from a sample fluid, with the chemical species being releasable from the sorptive material upon heating of the sorptive material by the at least one resistive heating element.
A non-planar chemical preconcentrator, comprising:
- a substrate having a suspended membrane formed thereon,
- at least one resistive heating element disposed on a surface of the suspended membrane,
- a sorption support structure comprising a honeycomb structure disposed on a surface of the membrane, and
- a sorptive material disposed on the sorption support structure to sorb and concentrate at least one chemical species from a sample fluid, with the chemical species being releasable from the sorptive material upon heating of the sorptive material by the at least one resistive heating element.
Dependencies are inferred from the claim text.