Chinese Journal of Applied Chemistry ›› 2015, Vol. 32 ›› Issue (8): 948-954.DOI: 10.11944/j.issn.1000-0518.2015.08.140427

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Hydroxyl Radical Scavenging Activity and Kinetics of Vitamin C

LI Yan,GONG Shilei,CHE Ying,JIN Li'e,Yan Guolan()   

  1. College of Chemistry and Chemical Engineering, Taiyuan University of Technology, Taiyuan 030024, China
  • Published:2015-08-08 Online:2015-08-08
  • Contact: Yan Guolan
  • Supported by:
     

Abstract:

For humanbeings, radicals scavenging plays an important role for maintaining the fundamental physiological and anti-ageing need. Comparison for competing scavenging ability of Vitamin C(VC) with salicylic acid gives optimal scavenging condition for VC. By fitting the Alberty equation, the maximum 46.23% clearance of ·OH by VC reached when VC concentration is 4.54 mmol/L at 47 ℃ for 90 min, and the maximum reaction rate is 0.11 mmol/(L·min). The dissociation constant for salicylic acid and VC is 30.2 mmol/L and 1.2×10-3 mmol/L, respectively. The experimental data are well-fitted with relative error of 1.66%~5.40%. This is helpful for the effective and scientific usage of VC.

 

Key words: hydroxyl radical, ascorbic acid, clearance rate, reaction kinetics

CLC Number: