What is the accurate procedure to calibrate gas chromatograph?
When running a sample, a base-line is first run using the Standard Gas, and the values compared to the Standard Gas’s certificate values. If they agree, then you’re ready to run a sample. The sample is run, and the results produced, but they are not final until a second base-line run is performed. If the values from the first and second base-line runs match, then the calibration on the instrument hasn’t changed, and the results from the sample run are valid. Multiple samples can be batched between base-line runs, but their results should not be considered valid until a base-line has been run both some time before and some time after the sample(s).
