Patent ID: 8584507
Filing Date: 2013-11-19
Classification: G01N

Abstract:
1. A gas sample introduction device for introducing sample gas to a gas analyzer, comprising: a measuring tube having a predetermined volume; a sample gas supply flow path for introducing the sample gas to the measuring tube; a carrier gas supply flow path for introducing carrier gas to the measuring tube; an exhaust flow path for discharging the gas which has passed through the measuring tube to outside; concentration means including a collecting tube for absorbing a predetermined component in the sample gas and concentrating the sample gas; first flow path switching means for switching between a first measuring state in which the measuring tube is inserted between the sample gas supply flow path and the exhaust flow path, and a second measuring state in which the measuring tube is inserted between the carrier gas supply flow path and the gas analyzer; and second flow path switching means for switching, in the first and the second measuring states, between a first collecting-tube state in which the collecting tube is inserted between the measuring tube and the exhaust flow path or between the measuring tube and the gas analyzer, and a second collecting-tube state in which the collecting tube is not inserted, wherein the component which has been absorbed into the collecting tube is desorbed at once, so that the component in high concentration outflow from the collecting tube is transmitted to a detector.