Gas chromatograph factor correction

The correction factor represents the content of a component per unit peak area; it can be a mass fraction, a volume fraction, or a molar fraction. Therefore, there are mass correction factors, volume correction factors, and molar correction factors. Since the performance of the same type of detector from different manufacturers can vary, relative correction factors are generally used; for thermal conductivity cells, this is based on benzene, and for hydrogen flame detectors, it is based on heptane. Therefore, the correction factor for methyl acetal can be determined separately on your equipment: use chromatographically pure methyl acetal or methyl acetal with a purity level that meets the requirements, determine the mass and volume of the sample to be injected, and by dividing these values by the peak area, the absolute correction factor for methyl acetal can be obtained. The same method can be used to determine the absolute correction factors for benzene or n-heptane; the ratio of these two values gives the relative correction factor for methyl acetal.