| abstract |
DEVICES, METHODS AND SYSTEMS FORn COLLECTION OF VOLATILE ORGANIC COMPOUNDS.nOne system comprises a mouthpiece for receiving expired air; a camera ofnbreathing to receive expired air; a valve to direct airnexpired along a desired flow path, directnpurge along a desired flow path, control the flow ratenpurge gas flow, control the exhaled air flow rate,nblocking the flow of purge gas, and/or blocking the flow of expired air;na source of purge gas; a CO2 cartridge to remove CO2; anwater cartridge to remove water; a breathing cartridge forncapture VOCs from expired air; a temperature control system forn control the temperature of a CO2 cartridge, a water cartridge,nand/or a breathing cartridge; a cryostat to contain and limit flown heat to a cryogenic liquid; a flowmeter designed ton measuring the flow of one or both of expired air and/or purge gas; it is anpressure transducer to measure a pressure, a flow rate, and/or an flow volume. |