Practical ion mobility spectrometer apparatus and methods for chemical and/or biological detection
View Patent ↗This invention describes an ion mobility spectrometer system for chemical detection in the field. The system allows: a high throughput operation, an interface to new ionization methods, and an interface to a mass spectrometer.
1. A multi-function sample introduction apparatus comprising: a sample loading port allows introducing a sample into an analytical instrument using a thermal desorber and/or an electrospray apparatus which both function in the same sample introduction apparatus; and an opening and/or interface to an ionization chamber of the analytical instrument.
2. The multi-function sample introduction apparatus of claim 1 ; wherein the sample loading port will accept a removable sample holder for direct insertion.
3. The multi-function sample introduction apparatus of claim 1 ; wherein the thermal desorber has a temperature programmable component.
4. The multi-function sample introduction apparatus of claim 3 ; wherein the thermal desorber has a shaped heating plate that is tailored to press onto the removable sample holder.
5. The multi-function sample introduction apparatus of claim 1 ; wherein the opening and/or interface have a gas outlet to bring a sample to the ionization chamber.
6. The multi-function sample introduction apparatus of claim 1 ; wherein the ionization chamber has a opening that accepts a sample in neutral and/or ionic form.
7. The multi-function sample introduction apparatus of claim 1 ; wherein the ionization chamber has an electric field that guides a sample toward an ion analyzer.
8. The multi-function sample introduction apparatus of claim 1 ; further comprises an ionization source that ionizes neutral molecules that enter the ionization chamber.
9. A removable sample holder for sample analysis comprising: a thermal desorption and/or electrospray ionization function in the same sample holder;
a means to receive the sample in liquid and/or solid form; a substantially sealed inner chamber; and at least one opening facing an analytical instrument having a function of releasing sample as vapor or charge liquid via an electrospray mechanism.
10. The removable sample holder of claim 9 ; wherein the sample is on a substrate.
11. The removable sample holder of claim 9 ; further comprises solvents and/or mixtures of solvents contained in a porous material.
12. The removable sample holder of claim 9 ; further comprises at least one deformable surface that allows for increasing a pressure in the sealed inner chamber.
13. The removable sample holder of claim 9 ; wherein the opening for releasing the sample is an electrospray nozzle.
14. The removable sample holder of claim 9 further comprises a hydrophilic coating on the inner surface and a hydrophobic coating surrounding the nozzle inlet area.
15. A sample introduction method comprising: loading a sample into a removable sample holder; inserting the removable sample holder into a sample loading port; and vaporizing some sample under a controlled temperature and/or temperature gradient into the ionization chamber using a thermal desorber or electrospraying the sample into an analytical instrument using the same sample holder.
16. The multi-function sample introduction apparatus of claim 1 ; further comprises at least one liquid inlet that introduces liquid samples into the ionization chamber.
17. The multi-function sample introduction apparatus of claim 16 ; wherein the liquid inlet has a means to apply a voltage for electrospraying a liquid sample.
18. A multi-function sample introduction method comprising:
introducing a sample into an analytical instrument using a sample port that allows thermal desorption and/or electrospray which both function in the same sample introduction apparatus; and transporting the sample to an ionization chamber of the analytical instrument through an opening and/or interface.
19. The sample introduction method of claim 15 wherein the sample is obtained by swabbing the sample with a wet or dry swab.
20. The sample introduction method of claim 15 further comprises dissolving the un-dissolving sample in the removable sample holder.
21. The sample introduction method of claim 15 further comprises deforming at least one surface of the removable sample holder to start the electrospray process.