Trace detector and analytical method for trace detector

US8309918B2 · kind B2 · utility

Assignee

• NUCTECH COMPANY LIMITED · CN

Inventors

• Hua Peng · Beijing, CN
• Jin Lin · Beijing, CN
• Wen He · Beijing, CN
• Yangtian Zhang · Beijing, CN
• Yaoxin Wang · Beijing, CN
• Peng Jiao · Beijing, CN
• Hui Li · Regensburg, DE
• Zhongxia Zhang · Beijing, CN

Key dates

• Filing date: Dec 30, 2009
• Grant date: Nov 13, 2012
• Expiry date: Sep 8, 2030

Classification

• Technology area (CPC G): Physics
• CPC primary: G01N1/40
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A trace detector is disclosed. The trace detector comprises: a desorption chamber defining a desorption region, and the desorption chamber has a housing. The housing has a sample feeding port for introducing a substance to be detected into the desorption chamber and a gas discharge port for discharging gas entraining the sample from the desorption chamber. A controller is used for controlling the trace detector in such a manner that the sample feeding port and the gas discharge port are in fluid communication with the desorption chamber during pre-concentration process of the trace detector, thereby continuously feeding and collecting the sample. With the above manner, data collecting, processing and analyzing processes may be performed by the trace detector throughout the sample feeding process and the gas pre-concentrating process. The trace detector has an excellent detecting period of time whether the substance to be detected in the gas is in a high concentration state or a low concentration state, and the trace detector can perform continuous sampling for a long time, thereby improving a ratio of the amount of trapped substance to the amount of the substance entrained in the g…