Disturbance of metachromasia of dye/polyanion systems by stoichiometric amounts of cetylpyridinium chloride
作者:
M. K. Pal,
Manju Biswas,
期刊:
Die Makromolekulare Chemie
(WILEY Available online 1972)
卷期:
Volume 151,
issue 1
页码: 121-125
ISSN:0025-116X
年代: 1972
DOI:10.1002/macp.1972.021510109
出版商: Hüthig&Wepf Verlag
数据来源: WILEY
摘要:
AbstractThe disturbance of metachromasia of a dye/polyanion system by cetyl pyridinium chloride (CPCl) has been estimated quantitatively from the difference of the amounts of dye left in the aqueous layer after carbon tetrachloride extraction of the metachromatic solution in the presence and absence of CPCl, as well as from conductometric titration of the dye/polyanion solution with CPCl. Results show that CPCl, unlike sodium chloride, displaces the dye ions from the polyanions almost stoichiometrically. This special behaviour of CPCl has been assigned to its tendency to form hydrophobic bonds. As dyes methylene blue and crystal violet, as polyanions chondroitin sulfate and heparin have been used.
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