Entrapment device of gaseous phase thing among mainstream smoke

The utility model relates to an entrapment device of gaseous phase thing among mainstream smoke, it is used for the cigarette of centre gripping cigarette (8) to prop up holder (1), trap (2), flow controller (6) and suction pump (5) including what the order was connected, the periphery of trap (2) is equipped with heat preservation (3), the top of trap (2) is equipped with extraction device (4), and the fibre head that is used for taking a sample of this extraction device (4) inserts in trap (2), wherein heat preservation (3) are by outside control by temperature change unit (7) accuse temperature to prevent the mainstream smoke condensation. The utility model discloses an entrapment device of gaseous phase thing among mainstream smoke can make pointed references to the gaseous phase thing in the flue gas especially volatile ingredient or specificity material and carry out entrapment and extraction to combine other instruments to carry out the analysis, repeatability is better, and sensitivity is high, and easy operation can avoid the interference of base member composition and solvent, has certain advantage in the aspect of the detection of flue gas composition.