Dynamic preconcentration method for small volume gas sample


Application Number: 00123042
Application Date: 2000.09.29
Publication Number: 1346055
Publication Date: 2002.04.24
Priority Information:
International: G01N30/06;G01N30/08
Applicant(s) Name: Dalian Inst. of chemical Physics, Chinese Academy of Sciences
Address:
Inventor(s) Name: Guan Yafeng;Miao Hong
Patent Agency Code: 21002
Patent Agent: zhang chen
Abstract The dynamic preconcentration method of small-volume gas sample is characterized by that firstly, the sample gas is driven by carrier gas and fed into concentration column, when the most of interference components is discharged from the concentration column and the leading edge of tested component band is about to flow out, the concentration column can be heated to make desorption, at the same time, the carrier gas is blown back to concentrate tested sample gas and make it feed into analysis column. Said invention can implement encichment of various gas hydrocarbons of C2 and above C2 at room temp. at the same time, it can obtain higher concentration ratio by using smaller sample quantity so as to meet high-sensitivity analysis.