Antioxidant activity assays on-line with liquid chromatography

Harm A. G. Niederlander, Teris A. van Beek*, Aiste Bartasiute, Irina I. Koieva

*Corresponding author for this work

Research output: Contribution to journalReview articlepeer-review

159 Citations (Scopus)

Abstract

Screening for antioxidants requires simple in vitro model systems to investigate antioxidant activity. High resolution screening (HRS), combining a separation technique like HPLC with fast post-column (bio)chemical detection can rapidly pinpoint active compounds in complex mixtures. In this paper both electrochemical and chemistry-based assays are reviewed and discussed. The focus is on the mechanisms involved and differences between the assays, rather than on the matrix or analytes. With 45 applications high resolution antioxidant screening has now become an almost routine tool for the rapid identification of antioxidants in plant extracts, foods and beverages. The methods based on true reactive oxygen species (ROS) provide the most realistic measure of antioxidant activity. Unfortunately these methods are difficult to set up and control and have not been applied since they were reported. The methods based on electrochemical detection are more practical, but have still received only limited attention for practical screening purposes. The methods based on a single relatively stable reagent such as DPPH center dot and ABTS(center dot+) have become most popular, because of their simple set-up and ease of control. The methods have been combined with on-line DAD, MS and NMR detection for rapid identification of active constituents. (c) 2008 Elsevier B.V. All rights reserved.

Original languageEnglish
Pages (from-to)121-134
Number of pages14
JournalJournal of Chromatography A
Volume1210
Issue number2
DOIs
Publication statusPublished - 14-Nov-2008

Keywords

  • Antioxidant activity
  • On-line assays
  • High performance liquid chromatography (HPLC)
  • Reactive oxygen species (ROS)
  • DPPH
  • ABTS
  • Electrochemical detection
  • RADICAL SCAVENGING COMPOUNDS
  • COULOMETRIC ARRAY DETECTION
  • FLOW-INJECTION SYSTEM
  • DPPH SCREENING METHOD
  • DAD-SPE-NMR
  • PHENOLIC-COMPOUNDS
  • ELECTROCHEMICAL DETECTION
  • NATURAL-PRODUCTS
  • PLANT-EXTRACTS
  • CHEMILUMINESCENCE DETECTION

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