Photochemistry - Photolysis of Riboflavin in Buffer solution at Different pH

This work was made to study the photochemistry of riboflavin and the kinetics of riboflavin degradation after exposure to UV-Vis light phosphate buffer solution at different pH interval (2-10) with the same concentration (5×10-5M ) was studied by the of UV-Vis spectrophotoscopy analyses, it showed that degradation increase as pH increase from pH (2-7)where the lumichrome a photoderivative forms in the acidic medium. a maximum degradation occurs at neutral pH (7). Then it began to decrease from pH (7-10). Where the lumiflavine (a photoderivative occurs at basic media) formed. We also calculated the quantum yield of this decomposition and found that an increasing occur from pH (2-7) (1.902×10-4-6.020×10-4) then a decrease occur from pH (7-10) (6.020×10-4- 1.266×10-4) as well as the reactivity ratio.

Product details

• Authors: Sura Attwan, Shahba Maki, Shahbaz Maki, Ema Yousif, Emad Yousif
• Publisher: LAP Lambert Academic Publishing
• Languages: English
• Product format: Paperback / Softback
• Released: 01.01.2015
• EAN: 9783659513008
• ISBN: 978-3-659-51300-8
• No. of pages: 88
• Subjects: Natural sciences, medicine, IT, technology > Chemistry; Non-fiction book > Nature, technology > Natural science