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Theory of fast capillary gas chromatography. Part 1: Column efficiency

✍ Scribed by Blumberg, Leonid M.

Book ID
102895329
Publisher
John Wiley and Sons
Year
1997
Tongue
English
Weight
729 KB
Volume
20
Category
Article
ISSN
0935-6304

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✦ Synopsis

Typically, fast GC requires high column pressure drop. Under that condition, known relations do not provide a complete description of dependence of [apparent] plate height, fi, on average velocity, U, of carrier gas. A complete descriptions for fi vs. U is derived and analyzed. It is shown that, under the high pressure drop, fi = B I U2 + Ci U2 + C2 U. This is substantially different from the Van Deemter equation fi = B l U + C U for the low pressure drop. Analytical expressions for the minimum plate height and for the respective optimum U under the high pressure drop are derived and analyzed.

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