Abstract
Slip mechanism and plate theory were utilized to the investigation of computing formulas of five plate numbers. Column plate number and peak plate number were two different concepts. Peak plate number was a new concept which came from slip mechanism. A good relation existed between the peak plate number and the asymmetry of practical peak of chromatogram. Peak plate number could be regarded as an asymmetry index of chromatogram peak, as column plate number is regarded as an efficiency index of column. The plate in slip mechanism was mobile, which was different from the fixed plate in plate theory. The five plate numbers were four kinds of column plate numbers and one kind of peak plate number (q’); the four column plate numbers were theoretical plate number (n0), real plate number (n), plate-model plate number (q0) and slip-mechanism plate number (q).
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