Problems in the calculation of gas chromatography analysis
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Is a correction factor needed to analyze the carbon dioxide content using a carbon molecular sieve column, when the gas contains only nitrogen and carbon dioxide? Should it be read directly as a percentage of the area? Thank you!
It is best to first use a standard sample to obtain a correction factor for calibration. If the results obtained in this way are consistent with those obtained using the area normalization method, then the area normalization method can be used for calculation; if they are not consistent, it is necessary to use the standard sample for calibration before each injection； But if your requirements are not high, you can also use the normalization method directly.
Different substances respond differently to the detector, so correction factors are necessary. Use the external standard method without a correction factor.
A correction factor should be used. Only hydrocarbons show a similar response in the FID, so it is possible to approximate normalization without using a correction factor. Other substances have different responses in the detector, requiring correction factors
Thank you all. I am analyzing the nitrogen and carbon dioxide components; the peak for nitrogen appears after one minute, while it takes four minutes for the carbon dioxide peak to appear. Can increasing the column temperature and the flow rate of the carrier gas shorten the distance between these two peaks? My column temperature is now 160 and the flow rate is 70