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Determination of the Dissociation Constants of Rosolic Acid by Spectrography
Author(s) -
Lin TsongHsing
Publication year - 1962
Publication title -
journal of the chinese chemical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.329
H-Index - 45
eISSN - 2192-6549
pISSN - 0009-4536
DOI - 10.1002/jccs.196200024
Subject(s) - chemistry , dissociation (chemistry) , dissociation constant , analytical chemistry (journal) , acid dissociation constant , molecular absorption , absorption spectroscopy , chromatography , spectral line , optics , aqueous solution , quantum mechanics , physics , receptor , biochemistry
Rosolic acid was found to exhibit an absorption maximum at 480 mμ which shifts toward longer wave‐lengths in alkaline solutions. Spectrophotometic observation on this absorption maximum was made, and the optical density vs p H curve was found to pass through a minimum at p H=5.98. By using Thamer and Vaigt's method, the author was able to evaluate the dissociation constants of rosolic acid.