Total phenolics and antioxidant activity of water and ethanolic extracts from distillers dried grains with solubles with or without microwave irradiation

George E. Inglett, Devin J. Rose, David G. Stevenson, Diejun Chen, Atanu Biswas

Research output: Contribution to journalArticle

16 Citations (Scopus)

Abstract

The purpose of this study was to determine the efficacy of extracting phenolic compounds with antioxidant activity from distillers' dried grains with solubles (DDGS) with water, 50% aqueous ethanol, and absolute ethanol, using microwave irradiation or a water bath at various temperatures. DDGS was extracted for 15 min with each solvent while heating at 23, 50, 100, and 150°C by microwave irradiation or in a water bath at 23, 50, and 100°C. Phenolic content of extracts increased with increasing temperature to a maximum of 12.02 mg/g in DDGS extracts that were microwave irradiated in water or with 50% aqueous ethanol at 150°C. Antioxidant activity range was 1.49-6.53 μmol of Trolox equivalents/g of DDGS. Highest antioxidant activities were obtained from 50% aqueous ethanol extracts at all temperatures, and water extracts that were heated at 100 and 150°C. These data indicate that DDGS extracts with high phenolic content and antioxidant activity can be obtained from DDGS, particularly with the use of water or 50% ethanol and high temperature (100 or 150°C). This may be valuable to ethanol manufacturers, livestock producers, and food and nutraceutical companies.

Original languageEnglish (US)
Pages (from-to)661-664
Number of pages4
JournalCereal Chemistry
Volume86
Issue number6
DOIs
StatePublished - Nov 1 2009

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Microwave irradiation
distillers grains
Microwaves
Ethanol
Antioxidants
antioxidant activity
irradiation
Water
extracts
ethanol
Temperature
water
Baths
temperature
Livestock
Dietary Supplements
Heating
Farms
Food
functional foods

ASJC Scopus subject areas

  • Food Science
  • Organic Chemistry

Cite this

Total phenolics and antioxidant activity of water and ethanolic extracts from distillers dried grains with solubles with or without microwave irradiation. / Inglett, George E.; Rose, Devin J.; Stevenson, David G.; Chen, Diejun; Biswas, Atanu.

In: Cereal Chemistry, Vol. 86, No. 6, 01.11.2009, p. 661-664.

Research output: Contribution to journalArticle

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