Electron donation mechanisms of β-carotene as a free radical scavenger

J. H. Lee; B. Ozcelik; D. B. Min

doi:10.1111/j.1365-2621.2003.tb08256.x

Electron donation mechanisms of β-carotene as a free radical scavenger

J. H. Lee^*, B. Ozcelik, D. B. Min

^*Corresponding author for this work

Department of Food Engineering

Ohio State University

Research output: Contribution to journal › Article › peer-review

38 Citations (Scopus)

Abstract

The free radical scavenging ability of β-carotene was studied using free radical 2,2-diphenyl-1-picryl-hydrazyl (DPPH). As the concentration of β-carotene in acetone increased, the absorbance of DPPH at 517 nm decreased, which indicates that β-carotene scavenges free radicals. It was shown that β-carotene does not work as an antioxidant in soybean oil. The NMR spectrum of DPPH with BHA in CDCl₃ showed a new peak at 5.0(d) was formed and the peak at 6.6(d) from BHA was split into 2 peaks, which may be due to the hydrogen atom donation from BHA to DPPH. The NMR spectra of DPPH with β-carotene did not change during reaction and no peak was formed.

Original language	English
Pages (from-to)	861-865
Number of pages	5
Journal	Journal of Food Science
Volume	68
Issue number	3
DOIs	https://doi.org/10.1111/j.1365-2621.2003.tb08256.x
Publication status	Published - Apr 2003

Keywords

DPPH
Electron donation mechanism
Free radical scavenger
NMR
β-carotene

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10.1111/j.1365-2621.2003.tb08256.x

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title = "Electron donation mechanisms of β-carotene as a free radical scavenger",

abstract = "The free radical scavenging ability of β-carotene was studied using free radical 2,2-diphenyl-1-picryl-hydrazyl (DPPH). As the concentration of β-carotene in acetone increased, the absorbance of DPPH at 517 nm decreased, which indicates that β-carotene scavenges free radicals. It was shown that β-carotene does not work as an antioxidant in soybean oil. The NMR spectrum of DPPH with BHA in CDCl3 showed a new peak at 5.0(d) was formed and the peak at 6.6(d) from BHA was split into 2 peaks, which may be due to the hydrogen atom donation from BHA to DPPH. The NMR spectra of DPPH with β-carotene did not change during reaction and no peak was formed.",

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AU - Lee, J. H.

AU - Ozcelik, B.

AU - Min, D. B.

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N2 - The free radical scavenging ability of β-carotene was studied using free radical 2,2-diphenyl-1-picryl-hydrazyl (DPPH). As the concentration of β-carotene in acetone increased, the absorbance of DPPH at 517 nm decreased, which indicates that β-carotene scavenges free radicals. It was shown that β-carotene does not work as an antioxidant in soybean oil. The NMR spectrum of DPPH with BHA in CDCl3 showed a new peak at 5.0(d) was formed and the peak at 6.6(d) from BHA was split into 2 peaks, which may be due to the hydrogen atom donation from BHA to DPPH. The NMR spectra of DPPH with β-carotene did not change during reaction and no peak was formed.

AB - The free radical scavenging ability of β-carotene was studied using free radical 2,2-diphenyl-1-picryl-hydrazyl (DPPH). As the concentration of β-carotene in acetone increased, the absorbance of DPPH at 517 nm decreased, which indicates that β-carotene scavenges free radicals. It was shown that β-carotene does not work as an antioxidant in soybean oil. The NMR spectrum of DPPH with BHA in CDCl3 showed a new peak at 5.0(d) was formed and the peak at 6.6(d) from BHA was split into 2 peaks, which may be due to the hydrogen atom donation from BHA to DPPH. The NMR spectra of DPPH with β-carotene did not change during reaction and no peak was formed.

KW - DPPH

KW - Electron donation mechanism

KW - Free radical scavenger

KW - NMR

KW - β-carotene

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Electron donation mechanisms of β-carotene as a free radical scavenger

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Keywords

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