Patent ID: 8640727

Claim:
A dopant gas generating device for supplying a dopant gas to an ion mobility spectrometry instrument, comprising: a doping container; an air inlet having an inlet end connecting with an upstream side of a carrier gas passage and an outlet end connecting with the doping container; an air outlet having an entrance end connecting with the doping container and an exit end connecting with an downstream side of the carrier gas passage; a dopant gas generating unit for releasing dopant gas, wherein the dopant gas generating unit is disposed within the doping container; further comprises a heating temperature control device comprising: a heating membrane surrounding a circumferential wall of the doping container; a temperature sensor for detecting the temperature of the doping container; a temperature controller for controlling the temperature of doping container based on the temperature detected by the temperature controller; and a heat insulating layer for covering the outside of the heating membrane so as to seal the doping container; said dopant gas generating unit comprises: a bottle body; and dopant disposed within said bottle body; and said bottle body comprises a cover removably covered an upper opening of the bottle body, said cover is provided with small bores thereon to allow a gas volatilized from the dopant to escape; a permeable membrane is provided on the upper opening of the bottle body, said permeable membrane can either prevent the dopant from leakage or allow the dopant gas to exude through the permeable membrane.