| 摘要 |
PROBLEM TO BE SOLVED: To provide a sample concentration device capable of effectively separating collected components, using a simple constitution. SOLUTION: After a sample component is collected by passing a sample gas through a low-temperature collection pipe 2, the collection pipe 2 is heated and a valve 5 is changed-over to allow a purge gas (also used as a carrier gas) through the collection pipe 2, in a direction opposite to the flow direction of the sample gas; while the captured sample components are separated from the collection pipe 2 to be introduced into the analyzer 10 of a rear stage. An orifice 13 is provided in the flow channel, on the inflow side of the purge gas provided in close vicinity to the collection pipe 2. According to this constitution, the flow velocity of the purge gas is throttled by the orifice 13 at heating and separation, and is increased in the collection pipe 2, the pressure of the purge gas is allowed to fall due to the Bernoulli effect, and accordingly, the separation efficiency of the collected components is enhanced. COPYRIGHT: (C)2007,JPO&INPIT
|
