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Electrochemical studies on antioxidants in bovine milk

Chen, Jun LU ; Gorton, Lo LU and Åkesson, Björn LU (2002) In Analytica Chimica Acta 474(1-2). p.137-146
Abstract
Cyclic voltammetry (CV), rotating disk electrode (RDE) linear sweep voltammetry and flow-injection amperometry (FIAmp) were used to investigate the possibility to determine antioxidants in bovine milk, whey and low-molecular-weight (LMW) fractions of whey. Using CV one major current wave was found in all types of samples at oxidation potentials between +600 and +700 mV against Ag | AgCl|0.1 mol l−1 KCl. The wave registered for the LMW fraction disappeared after treatment with uricase as shown by CV and RDE, indicating that the major antioxidant in the LMW fraction may be urate. The antioxidant capacities of the LMW fractions were also measured by the FIAmp method using an oxidation potential of +700 mV with Trolox as standard, and values... (More)
Cyclic voltammetry (CV), rotating disk electrode (RDE) linear sweep voltammetry and flow-injection amperometry (FIAmp) were used to investigate the possibility to determine antioxidants in bovine milk, whey and low-molecular-weight (LMW) fractions of whey. Using CV one major current wave was found in all types of samples at oxidation potentials between +600 and +700 mV against Ag | AgCl|0.1 mol l−1 KCl. The wave registered for the LMW fraction disappeared after treatment with uricase as shown by CV and RDE, indicating that the major antioxidant in the LMW fraction may be urate. The antioxidant capacities of the LMW fractions were also measured by the FIAmp method using an oxidation potential of +700 mV with Trolox as standard, and values between 100 and 130 mol l−1 Trolox equivalents were obtained. It is concluded that different electrochemical methods can be used to measure antioxidants in milk. (Less)
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organization
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type
Contribution to journal
publication status
published
subject
keywords
Flow-injection amperometry (FIAmp), Rotating disk electrode (RDE) linear sweep voltammetry, Cyclic voltammetry (CV), Bovine milk and whey, Antioxidant
in
Analytica Chimica Acta
volume
474
issue
1-2
pages
137 - 146
publisher
Elsevier
external identifiers
  • wos:000179404300015
  • scopus:0037049266
ISSN
1873-4324
DOI
10.1016/S0003-2670(02)01004-8
language
English
LU publication?
yes
id
749b9380-7ecf-493f-968e-6d4dd6a0f17e (old id 119254)
date added to LUP
2007-06-27 08:51:27
date last changed
2017-07-09 04:26:23
@article{749b9380-7ecf-493f-968e-6d4dd6a0f17e,
  abstract     = {Cyclic voltammetry (CV), rotating disk electrode (RDE) linear sweep voltammetry and flow-injection amperometry (FIAmp) were used to investigate the possibility to determine antioxidants in bovine milk, whey and low-molecular-weight (LMW) fractions of whey. Using CV one major current wave was found in all types of samples at oxidation potentials between +600 and +700 mV against Ag | AgCl|0.1 mol l−1 KCl. The wave registered for the LMW fraction disappeared after treatment with uricase as shown by CV and RDE, indicating that the major antioxidant in the LMW fraction may be urate. The antioxidant capacities of the LMW fractions were also measured by the FIAmp method using an oxidation potential of +700 mV with Trolox as standard, and values between 100 and 130 mol l−1 Trolox equivalents were obtained. It is concluded that different electrochemical methods can be used to measure antioxidants in milk.},
  author       = {Chen, Jun and Gorton, Lo and Åkesson, Björn},
  issn         = {1873-4324},
  keyword      = {Flow-injection amperometry (FIAmp),Rotating disk electrode (RDE) linear sweep voltammetry,Cyclic voltammetry (CV),Bovine milk and whey,Antioxidant},
  language     = {eng},
  number       = {1-2},
  pages        = {137--146},
  publisher    = {Elsevier},
  series       = {Analytica Chimica Acta},
  title        = {Electrochemical studies on antioxidants in bovine milk},
  url          = {http://dx.doi.org/10.1016/S0003-2670(02)01004-8},
  volume       = {474},
  year         = {2002},
}