Sample injection device and method for sample collection and sample thermal desorption, and trace detection apparatus

US10215666B2 · kind B2 · utility

Assignee

• NUCTECH COMPANY LIMITED · CN

Inventors

• Qingjun Zhang · Beijing, CN
• Yuanjing Li · Beijing, CN
• Zhiqiang Chen · Beijing, CN
• Weiping Zhu · Beijing, CN
• Huishao He · Beijing, CN
• Qiufeng Ma · Beijing, CN
• Yaohong Liu · Beijing, CN
• Xiang Zou · Beijing, CN
• Jianping Chang · Beijing, CN

Key dates

• Filing date: Dec 28, 2015
• Grant date: Feb 26, 2019
• Expiry date: Jun 4, 2036

Classification

• Technology area (CPC G): Physics
• CPC primary: G01N2030/128
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A sample injection device for sample collection and thermal desorption includes: a sample collection structure; a piston type adsorber having an adsorption cavity communicating with the sample collection structure; a piston cylinder defining a piston chamber accommodating the adsorber and communicating with the adsorption cavity; a thermal desorption chamber communicating with the adsorption cavity and the piston chamber; and a pump configured to pump a sample diffused in an ambient gas into the adsorption cavity through the sample collection structure and the piston chamber; the adsorber is movable between a sample collecting position where the adsorption cavity is outside the thermal desorption chamber and adsorbs the sample collected by the sample collection structure and a sample desorbing position where the adsorption cavity is inside the thermal desorption chamber so that the adsorbed sample is thermally desorbed in the thermal desorption chamber.