| abstract |
The utility model discloses a human body respiratory gas in-situ sampling device comprising a respiration sampling one-off blowing nozzle, a gas storage chamber, a heating sleeve, an adsorption tube, a breakthrough volume control unit, a singlechip, a drying bottle, a mass flow controller and a mini vacuum pump. The human body respiratory gas in-situ sampling device realizes sampling and gathering of volatile organic compounds in exhaled air of a human body, the respiration sampling one-off blowing nozzle realizes control on direction of human respiratory airflow, with the gas storage chamber, gas interference caused by a human body dead anatomical space part is eliminated automatically, the breakthrough volume control unit accurately controls the breakthrough volume performance of the adsorbing material in the adsorption tube when sampling is performed, and the mass flow controller realizes accurate control and measurement on the sampling flow. |