INFICON Explorer Portable Gas Chromatograph - Manual (Page 301)

Explorer Operator Manual
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7. In SiteChart, select Column C and perform a second run on Column C.
This run will give two peaks. The first peak is chloromethane at about 135
seconds and the second peak is vinyl chloride at about 150 seconds. You will
need to calibrate these two compounds on Column C.
8. The instrument must be calibrated to update retention time and detector
response information for the three target compounds.
9. Store the compounds in the custom method file and save the method file.