Chromatographic columns containing a large number of theoretical plates

✍ Scribed by A. S. Said

• Book ID: 101425171
• Publisher: American Institute of Chemical Engineers
• Year: 1959
• Tongue: English
• Weight: 207 KB
• Volume: 5
• Category: Article
• ISSN: 0001-1541
• DOI: 10.1002/aic.690050218

✦ Synopsis

Abstract

To obtain numerical answers for the concentration distribution of solute on a chromatographic column or in the effluent, tables and charts of the Poisson distribution are used. Their use however is limited to a small number of theoretical plates. The transformation of the Poisson to the normal distribution enables the calculations to be performed for any number of theoretical plates through the use of the normal distribution tables.

Equations derived previously for columns containing a large number of plates and employing elaborate mathematical procedures and approximations have been simply deduced by applying a limit property of the Poisson distribution to the exact equations.

A relationship between the Poisson and normal distribution is derived, and charts are drawn which allow the rapid evaluation of the Poisson in terms of the normal values.