Abstract
The flow-rate of the carrier gas in gas chromatography can be programmed by a technique developed for use with capillary columns. Provided that the flow-rate is an exponential function of time, the chromatograms obtained are very similar to those obtained with linear temperature programming. Two types of flow programmers have been constructed, both of which are continuously operating mechanical systems controlled by digital electronic units. The effect of flow programming compared with temperature programming is illustrated by a few chromatograms.
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