ORAChromatography and total phenolics content of peanut root extracts

Kevin W. Holland, Maria Balota, William N. Eigel, Parameswarakumar Mallikarjunan, James M. Tanko, Kequan Zhou, Sean F. O'Keefe

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

A large number of compounds have been reported in peanut plants. Many of these compounds are phytoalexins, which are produced by plants experiencing environmental stress and often exhibit antioxidant activity. It is difficult to determine which of the many compounds has the greatest impact on total antioxidant capacity in a mixture. The objectives of this research were to examine the oxygen-radical absorbing capacity (ORAC) value and total phenolic contents of peanut root extracts and peanut root extract fractions collected via HPLC. Peanut roots were extracted from four different cultivars (Brantley, NC-12, Phillips, and Wilson) with 70% aqueous ethanol with ultrasonic assistance. Each cultivar was sampled in duplicate. The extracts were fractionated into 18 3-min fractions by HPLC using a C-18 column. Fractions and crude extracts were freeze dried. ORAC values and total phenolic content were then determined for all fractions and crude extracts. Fractions had a significant effect on the μM TE/mg gallic acid equivalents (GAE). ORAC values ranged from -46.89 μM TE to 185 μM TE in HPLC fractions. ORAChromatography can be used to focus on antioxidants in complex samples.

Original languageEnglish (US)
JournalJournal of Food Science
Volume76
Issue number3
DOIs
StatePublished - Apr 1 2011

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peanuts
Reactive Oxygen Species
Antioxidants
High Pressure Liquid Chromatography
extracts
reactive oxygen species
Complex Mixtures
Gallic Acid
antioxidants
Ultrasonics
phytoalexins
cultivars
gallic acid
Ethanol
ultrasonics
antioxidant activity
ethanol
Arachis
Research
water

Keywords

  • Antioxidant
  • ORAC
  • Peanut roots
  • Phytoalexin
  • Total phenolics

Cite this

ORAChromatography and total phenolics content of peanut root extracts. / Holland, Kevin W.; Balota, Maria; Eigel, William N.; Mallikarjunan, Parameswarakumar; Tanko, James M.; Zhou, Kequan; O'Keefe, Sean F.

In: Journal of Food Science, Vol. 76, No. 3, 01.04.2011.

Research output: Contribution to journalArticle

Holland, Kevin W. ; Balota, Maria ; Eigel, William N. ; Mallikarjunan, Parameswarakumar ; Tanko, James M. ; Zhou, Kequan ; O'Keefe, Sean F. / ORAChromatography and total phenolics content of peanut root extracts. In: Journal of Food Science. 2011 ; Vol. 76, No. 3.
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