Hand-held device for quickly detecting pesticide residues

The utility model provides a hand-held device for quickly detecting the pesticide residues, including a cavity having a gas inlet, a gas outlet and a gas pump thereon, and characterized in that a dust filter communicated with the gas inlet is provided in the cavity; the dust filter is communicated with an ionization chamber which has a radiation source inside; the ionization chamber is communicated with an ion removal chamber in which a plurality of electrode couple pole plates are provided; the ion removal chamber is communicated with a metal oxide semiconductor gas sensor; and the electrode couple in the ion removal chamber, a pickup electrode of the metal oxide semiconductor gas sensor and the gas pump are electrically connected with a central control processor. The device employing the gas sampling method of smelling sucks the pesticide residue sample gas on the objects such as the vegetables, the fruits or the like to be detected without pretreatment sample preparation, thus detecting the sucked gas in r