A kinetic study for the estimation of riboflavin sensitized photooxidation of pyridoxine HCl using green UV-visible spectrometric and HPLC methods.

ABSTRACT: Riboflavin (RF) sensitized photooxidation of pyridoxine HCl (PD) in the pH range of 2.0-12.0 has been carried out under UV and visible irradiation in aerobic and anaerobic conditions. PD follows first-order kinetics in the absence and presence of RF for its photodegradation. The first-order rate constants (k _obs) for the photodegradation of PD in the presence of RF (0.05-0.50 × 10^-4 M) in aerobic and anaerobic conditions range from 0.046-0.755 and 0.0089-0.755 × 10^-2 min^-1, respectively. RF acts as a promoter for the photodegradation of PD and the second-order rate constants (k ₂) are in the range of 0.026-1.285 and 0.004-0.128 × 10^-2 M^-1 min^-1 in aerobic and anaerobic conditions, respecti

SUBMITTER: Anwar Z 

PROVIDER: S-EPMC11632597 | biostudies-literature | 2024 Dec

REPOSITORIES: biostudies-literature