Looking at all the different chromatographic techniques, capillary gas chromatography (CGC) is by far the most mature. Here, we define ‘mature technique’ as a technique that has reached a state of ‘satisfaction’, with a stable but low growth rate. Indeed, over the past decade, few groundbreaking developments have been realized in CGC. Since the invention of the technique by Golay in 1957 (1), most theoretical fundamentals of CGC were described in the 1960s and 1970s. Indeed, few studies have added valuable extensions to that fundamental work; exceptions include the papers by Blumberg and Klee (2), (3), who introduced novel and practical concepts, such as speed flow rates and optimal heating rates in CGC. Notably, this work has hardly been applied in practice for optimizing GC separations! Does this reflect that knowledge (and know-how) has been decreasing over recent years?
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