INFICON Explorer Portable Gas Chromatograph - Manual (Page 38)

Explorer Operator Manual
36
Carrier Gas
It is advisable to obtain a large cylinder of carrier gas, from which Explorer can
be operated directly or from which the internal carrier gas cylinder can be refilled.
Carrier gas - Specify high purity nitrogen, containing less than 0.1 part per
million (ppm) of hydrocarbon contamination. Nitrogen of this quality is
referred to as Ultra High Purity and is available commercially. Specify a CGA
580 outlet on the tank.
Your assay may require air. Specify high purity air, containing less than
0.1 ppm of hydrocarbon contamination. Such air is usually referred to as Ultra
Zero, or Zero Zero grade and is available commercially. Specify a CGA 590
outlet on the tank.
NOTE: You must use nitrogen if you are using the ECD.
Carrier Gas Filling Station - MX3803 23 for nitrogen or MX380325 for air.
Carrier gas regulator - Specify a two stage, high purity regulator with a CGA
590 connection for air or, a CGA 580 connection for nitrogen. The regulator
should also have a 1/8”, parallel, compression fitting with which to connect
the regulator to
Explorer. The delivery pressure must be adjustable to 100
psig
A stainless steel diaphragm regulator should be used as this will reduce the
potential for the carrier gas to be contaminated by the regulator itself.
The regulator must be absolutely clean and free from any oil or other
contamination. Teflon or stainless steel tubing should be used to connect
the regulator to
Explorer.
NOTE: Never use vinyl or rubber tubing to connect the regulator to Explorer, as these
materials will result in contamination of the system.