Use of Methanolysis for the Determination of Total Ellagic and Gallic Acid Contents of Wood and Food Products

Anhydrous methanolic HCl has been found to be an excellent reagent for releasing ellagic acid and gallic acid (as methyl gallate) from biomass substrates. Optimization of both the reaction conditions and the gradient HPLC analysis has led to the development of a new protocol. The method provides ell...

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Veröffentlicht in:	Journal of agricultural and food chemistry 2001-03, Vol.49 (3), p.1165-1168
Hauptverfasser:	Lei, Zhentian, Jervis, Judith, Helm, Richard F
Format:	Artikel
Sprache:	eng
Schlagworte:	Agronomy. Soil science and plant productions Alcoholic Beverages - analysis Biological and medical sciences Chemical constitution Chromatography, High Pressure Liquid - methods Economic plant physiology Ellagic Acid - analysis Food Analysis - methods Food industries Fruit - chemistry Fruit and vegetable industries Fundamental and applied biological sciences. Psychology Gallic Acid - analysis Hydrochloric Acid Indicators and Reagents Methanol Trees - chemistry Wood
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Beschreibung
Zusammenfassung:	Anhydrous methanolic HCl has been found to be an excellent reagent for releasing ellagic acid and gallic acid (as methyl gallate) from biomass substrates. Optimization of both the reaction conditions and the gradient HPLC analysis has led to the development of a new protocol. The method provides ellagic acid yields significantly higher than those obtained previously, indicating total ellagic acid contents of several substrates have previously been underestimated. Keywords: Ellagic acid; gallic acid; HPLC; ellagitannins; methanolysis; methyl gallate
ISSN:	0021-8561 1520-5118
DOI:	10.1021/jf000974a