Patent ID: 8247239
Filing Date: 2012-08-21
Classification: G01N,Y10T

Abstract:
1. A method for introducing standard gas into a sample vessel, comprising: providing a carrier gas inlet for supplying carrier gas; providing a sample vessel holding a sample gas; providing a sampling head having a sample chamber; providing an internal standard valve; providing a receptacle disposed in the sampling head, the receptacle adapted to be at least partially inserted into and withdrawn from the vessel, the receptacle having a vessel port, a sample chamber port and a seal; purging the receptacle by bringing the vessel port above the seal and opening the internal standard valve; at least partially inserting the receptacle into the vessel when the vessel is holding the sample gas; pressurizing the vessel by communicating carrier gas along a flow path from the carrier gas inlet to the vessel port when the vessel port is located within the vessel; introducing a volume of standard gas into the flow path of the carrier gas and into the sample vessel as the vessel is being pressurized; and extracting the sample, the carrier gas, and the standard gas from the vessel, communicating the sample gas, carrier gas, and standard gas extracted from the vessel through an adsorbent, which adsorbs analytes in the sample gas and the standard gas, and out a vent, wherein the step of introducing the volume of standard gas into the flow path of the carrier gas occurs prior to the step of extracting the sample, the carrier gas, and the standard gas from the vessel, and wherein the step of introducing a volume of standard gas into the flow path of carrier gas comprises actuating the internal standard valve.