Studies on the absorption spectra of aqueous l-tyrosine and its dissociation equilibria.
The UV absorption spectra of aqueous tyrosine at various total ionic strengths were measured at known pH values at 298.2+/-0.2 K. The standard third dissociation constant of tyrosine was determined from the spectra by linear extrapolation and polynomial approximation. The results obtained from both methods are in good agreement within experimental error.
Yang
J Z
JZ
Department of Chemistry, Liaoning University, Shenyang 11 0036, People's Republic of China.
Zhang
Z F
ZF