Methode zur Bestimmung von Diffusionskoeffizienten in Flüssigkeiten | Zendy

Jeanneret R. | Zendy; Grün F. | Zendy

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Methode zur Bestimmung von Diffusionskoeffizienten in Flüssigkeiten

Author(s) -

Jeanneret R.,

Grün F.

Publication year - 1958

Publication title -

helvetica chimica acta

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.74

H-Index - 82

eISSN - 1522-2675

pISSN - 0018-019X

DOI - 10.1002/hlca.19580410724

Subject(s) - chemistry , triolein , diffusion , analytical chemistry (journal) , chromatography , thermodynamics , organic chemistry , physics , lipase , enzyme

A method for measuring diffusion coefficients in liquids is described. The diffusing substance S is radioactively tagged. At time zero it is concentrated at the bottom of a vessel containing the diffusion medium M. During the experiment it moves through M by diffusion towards a G EIGER ‐M ÜLLER tube. From the total number of counts registered as a function of time a time lag L is determined which is characteristic for the experiment. The value of the diffusion coefficient D is calculated from L and from the thickness d of M. For tristearin in triolein we find (with a confidence level of 95%) D = (7,57 ± 0,83)·10 −8 cm 2 /sec.

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