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Mass transfer coefficients in gas chromatography on porous polymers of the proapak type

✍ Scribed by N.R. Rakshieva; J. Novák; S. Wičar; J. Janák

Publisher
Elsevier Science
Year
1974
Tongue
English
Weight
585 KB
Volume
91
Category
Article
ISSN
1873-3778

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✦ Synopsis

The mass transfer coefficients in the gas chromatography of n-heptane on several kinds of Porapak, Porapak Q modified with various loadings of F-60 silicone oil, some inorganic adsorbents, and an F-60 silicone oil gas-liquid chromatographic (GLC) packing were determined at 1 SO". The sorbent phase mass transfer coefficients of unmodified Porapak P and Q are comparable with those of alumina and Alusil and do not differ substantially from the liquid phase mass transfer coefficient of the GLC packing. The findings indicate that there is a substantial contribution to the mass transfer resistance due to surface diflusion with all the adsorbents studied..& appears that the sorption mechanism involved in gas chromatography on Porapaks is adsorption rather than bulk dissolution.

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