Computer comparisons of variables in capillary gas chromatography

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Abstract
A series of computer‐constructed van Deemter curves that permits evaluation of a number of variables in capillary gas chromatography is presented. The graphs permit the comparison of inter‐related parameters, including the choice of carrier gas (hydrogen vs helium vs nitrogen), column length (10‐100 m), column diameter (0.20, 0.25, 0.32, 0.4 mm), solute partition ratios (0‐10), and liquid phase film thickness (0.1, 0.25, 0.5, 1.0 μm). The curves are evaluated, both in terms of the relative magnitude of the optimum average linear carrier gas velocity, and in terms of the significance of the sharpness of the curve.