BIBLIOS

Document type
Journal articles

Document subtype
Full paper

Title
Diffusion coefficients of tetrazolium blue in homogeneous and micellar solutions

Participants in the publication
M. I. Viseu (Author)
INSTITUTO SUPERIOR TÉCNICO
C. A. Nieto de Castro (Author)
Dep. Química e Bioquímica
CQE
S. M. B. Costa (Author)
INSTITUTO SUPERIOR TÉCNICO

Summary
Diffusion coefficients of the electron acceptor dye tetrazolium blue were measured by the Taylor dispersion method, with an accuracy better than 4%, in two solvents: (i) a homogeneous one-aqueous phosphate buffer, 0.1 M, pH=7.0 (medium I); and (ii) a heterogeneous one-nonionic micelles of Triton X-100, 2.0 mM (where M stands for mol·dm−3), in the same aqueous phosphate buffer (medium II). The values obtained were D I12=3.64×10−10m2·s−1 and D II12=3.01×10−10m2·s−1·D II12has the meaning of a “macroscopic or “average” diffusion coefficient, in which the partition coefficient of tetrazolium blue between micelles and water, as well as the diffusion coefficients of this dye and of the micelles in the aqueous phase, are involved.


Institution
FACULDADE DE CIÊNCIAS DA UNIVERSIDADE DE LISBOA

Where published
International Journal of Thermophysics

Publication Identifiers

Publisher
Springer Science and Business Media LLC



Document Identifiers
DOI - https://doi.org/10.1007/bf00500755
URL - http://dx.doi.org/10.1007/bf00500755

Keywords
diffusion tetrazolium blue Taylor dispersion method Triton X-100 micelles

Download