Discoloration kinetics of L-ascorbyl 6-palmitate powders with various water contents

Lan Hsin Hung, Yukitaka Kimura, Shuji Adachi

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

The discoloration of L-ascorbyl 6-palmitate, with water contents ranging from 2 to 10% (w/w) during storage at temperatures of 60 to 90°C, was investigated by monitoring the absorbance at 500 nm of its solutions dissolved in methanol. The discoloration process of the substrate was expressed by the modified Weibull equation under all conditions, and the kinetic parameters were evaluated. The activation energy and frequency factor were estimated based on the Arrhenius equation for the substrates of various water contents, and the enthalpy-entropy compensation held for the discoloration process. Comparison of the discoloration kinetic parameters for L-ascorbyl 6-palmitate with those for L-ascorbic acid revealed that the discoloration of L-ascorbyl 6-palmitate was weaker than that of L-ascorbic acid.

Original languageEnglish
Pages (from-to)7-12
Number of pages6
JournalFood Science and Technology Research
Volume13
Issue number1
DOIs
Publication statusPublished - Feb 2007
Externally publishedYes

Fingerprint

Discoloration
Palmitates
palmitates
discoloration
Powders
Water content
powders
water content
kinetics
Ascorbic Acid
Kinetics
Water
Ascorbic acid
Kinetic parameters
Entropy
ascorbic acid
Methanol
Substrates
enthalpy
entropy

Keywords

  • Discoloration kinetics
  • L-ascorbyl 6-palmitate
  • Water content
  • Weibull equation

ASJC Scopus subject areas

  • Food Science

Cite this

Discoloration kinetics of L-ascorbyl 6-palmitate powders with various water contents. / Hung, Lan Hsin; Kimura, Yukitaka; Adachi, Shuji.

In: Food Science and Technology Research, Vol. 13, No. 1, 02.2007, p. 7-12.

Research output: Contribution to journalArticle

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