| http://www.w3.org/ns/prov#value | - With reference to FIG. 1, described herein is a method for maintaining the retention times constant for the analysis of a mixture after the variation in length of the capillary column and/or the variation in the output pressure of the carrier gas, where the length of the column is not known, but its initial pneumatic resistance KCold (for example, measured via an experimental blank test) is known,
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