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Beverages 2015, 1(3), 169-182; doi:10.3390/beverages1030169

Extractability of Rutin in Herbal Tea Preparations of Moringa stenopetala Leaves

1
Pharmacognosy Research Laboratories, Medway School of Science, University of Greenwich, Chatham-Maritime, Kent ME4 4TB, UK
2
Herbal Analysis Services, Chatham-Maritime, Kent ME4 4TB, UK
3
Department of Botany, C.M.S. College, Kottayam, Kerala 686001, India
*
Author to whom correspondence should be addressed.
Academic Editor: Edgar Chambers
Received: 8 July 2015 / Revised: 27 July 2015 / Accepted: 1 August 2015 / Published: 7 August 2015
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Abstract

The study examined the comparative rutin contents and antioxidant potentials of the two closely related Moringa species: the Ethiopian (Moringa stenopetala) and Indian Moringa (M. oleifera). It is demonstrated that M. stenopetala leaves extract was a far superior (more than five-fold better) antioxidant than M. oleifera. Rutin was the principal constituent of M. stenopetala leaves while the compound was not detected in the leaves of M. oleifera. Quantitative HPLC-based analysis of M. stenopetala leaves revealed the rutin level at a respectable 2.34% ± 0.02% (on dry weight basis), which is equivalent to many commercial natural sources of this highly sought-after bioactive compound. Comparative analysis of rutin in some common herbal tea preparations of M. stenopetala leaves revealed that it is readily extractible with the highest amount obtained (98.8% ± 2.4%) when the leaves (1 g) were boiled in water (200 mL). For a large-scale exploitation of rutin, a fast and economically-viable isolation approach using solid phase extraction followed by crystallization or flash chromatography is outlined. Overall, the Ethiopian Moringa is distinctively different from the Indian Moringa and could be exploited as an industrial source of rutin for nutritional and/or medical uses. View Full-Text
Keywords: Moringa stenopetala; Moringa oleifera; Ethiopian Moringa; Indian Moringa; antioxidant; rutin; rutin extraction; industrial source of rutin Moringa stenopetala; Moringa oleifera; Ethiopian Moringa; Indian Moringa; antioxidant; rutin; rutin extraction; industrial source of rutin
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Habtemariam, S.; Varghese, G.K. Extractability of Rutin in Herbal Tea Preparations of Moringa stenopetala Leaves. Beverages 2015, 1, 169-182.

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