Devices, systems and methods for elution of particles from flat filters
AssigneeInnova Prep LLC
InventorsAndrew Edward Page, David Scott Alburty, Alec D. Adolphson, Pamela S. Murowchick, Zachary A. Packingham
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Abstract
Devices, systems and methods are disclosed which relate to using a wet foam elution method for removal of particles from a flat filter. Particles are captured from the atmosphere onto the flat filter. The flat filter is then placed into an extractor which passes a stream of wet foam through the flat filter. Expansion of the foam works to efficiently remove captured particles. The foam flows from the filter along with the captured particles into a sample container. Once in the sample container, the foam quickly breaks down leaving an analysis ready liquid sample.
Claims18
A system, the system comprising:
- a flat filter which includes a cassette housing and a filter material through which fluid flows;
- an extractor for backflushing the flat filter with an elution foam, wherein the source of the foam includes an elution foam solution inside a pressurized container, the extractor having a sealed pressure chamber in which the elution foam breaks down into a liquid containing a sample;
- a vent in the sealed chamber for releasing a positive pressure caused by the elution foam breaking down into a liquid containing a sample;
- and
- a container for collecting the foam;
- wherein the flat filter collects the sample from the fluid, then the foam backflushes the flat filter into the container.
A method, the method comprising:
- collecting particles from a fluid in an air flow onto a flat filter;
- backflushing the filter with elution foam;
- and
- using a vent to release a positive pressure caused by the elution foam breaking down into a liquid containing a sample.
A device for extracting a sample from a fluid, the device comprising:
- a filter material;
- a cassette housing containing the filter material with the filter material substantially exposed on both sides;
- wherein the cassette housing is adapted to be sealingly inserted between a nozzle and a sample container, the nozzle for an elution foam used to backflush the flat filter into the sample container, wherein the nozzle is connected to an elution foam solution inside a pressurized container;
- and
- a vent in the cassette housing for releasing a positive pressure caused by the elution foam breaking down into a liquid containing the sample.
Dependencies are inferred from the claim text.