• Y.TRIVENI
• DR. BBV SAILAJA

The impact of Triton X-100 on the protonation equilibria of L-methionine and L-cysteine has been studied in various concentrations (0.5-2.5% v/v) of TX-100 solution maintaining an ionic strength of 0.16 mol dm-3 at 303K using a pH-metric method. The protonation constants have been calculated using the computer program MINIQUAD75 and the best fit models are arrived based on statistical grounds employing crystallographic R factor, χ2, skewness and kurtosis. These protonation constants values have been found to shift in micellar media as compared to those in pure water. The differences in the values have been attributed to the solvent properties of the interfacial and bulk phases involving contribution from the micellar surface potential. The trend of log values of step-wise protonation constants with mole fraction of the medium have been explained based on electrostatic and non-electrostatic forces operating on the protonation equilibria. Distribution of species, protonation equilibria and effect of influential parameters on the protonation constants has also been presented.

Protonation equilibria, , Triton X-100, L-methionine, L-cysteine, MINIQUAD75

"SOLVENT EFFECT ON PROTONATION EQUILIBRIA OF L-METHIONINE AND L-CYSTEINE IN NEUTRAL SURFACTANT MEDIUM", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.7, Issue 1, page no.703-709, January-2020, Available :http://www.jetir.org/papers/JETIR1908708.pdf

"SOLVENT EFFECT ON PROTONATION EQUILIBRIA OF L-METHIONINE AND L-CYSTEINE IN NEUTRAL SURFACTANT MEDIUM", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.7, Issue 1, page no. pp703-709, January-2020, Available at : http://www.jetir.org/papers/JETIR1908708.pdf