Efficient and selective method to separate triterpene acids by direct treatment of apple peels with alkaline ethanol

Triterpene acid extraction from dried apple peels of Fuji and Gala varieties in 2%NaOH/ethanol at room temperature, followed by filtration and acidification (pH 3), was investigated, comparing to a classical exhaustive extraction (Soxhlet, 2 h, with ethanol and methanol, >97% recovery). Alkali-et...

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Published in:Separation science and technology 2016-08, Vol.51 (12), p.1986-1993
Main Authors: Tostes, João Batista de Freitas, Nakamura, Marcos Jun, de Saboya, Caroliny Gomes Franca, Mazzei, José Luiz, Siani, Antonio Carlos
Format: Article
Language:English
Subjects:
Acidification
Apple peels
cutin depolymerization
Ethanol
Ethyl alcohol
Extraction
Filtration
Methyl alcohol
Recovery
Solvents
triterpenes
ursolic acid
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cited_by cdi_FETCH-LOGICAL-c423t-a7322ad58e6c5cbcfac986687ec1327c570e9b6524c28d3230165407cdc50eb63
cites cdi_FETCH-LOGICAL-c423t-a7322ad58e6c5cbcfac986687ec1327c570e9b6524c28d3230165407cdc50eb63
container_end_page 1993
container_issue 12
container_start_page 1986
container_title Separation science and technology
container_volume 51
creator Tostes, João Batista de Freitas
Nakamura, Marcos Jun
de Saboya, Caroliny Gomes Franca
Mazzei, José Luiz
Siani, Antonio Carlos
description Triterpene acid extraction from dried apple peels of Fuji and Gala varieties in 2%NaOH/ethanol at room temperature, followed by filtration and acidification (pH 3), was investigated, comparing to a classical exhaustive extraction (Soxhlet, 2 h, with ethanol and methanol, >97% recovery). Alkali-ethanol process yielded 4.35-6.86% (w/w) of whitish extracts, up to 15 times less than Soxhlet but with same recovery (P > 0.05) of ursolic and oleanolic acids. Alkaline extraction of previously defatted peels led to same recovery (P > 0.05), but the yield increased slightly (P < 0.01). The cost-effective and environmental-friendly procedure prepares triterpene-rich extracts from apple peels at high recovery, directly eliminating the cutin and avoiding prior treatments with hazardous organic solvents.
doi_str_mv 10.1080/01496395.2016.1200088
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source Taylor and Francis Science and Technology Collection
subjects Acidification
Apple peels
cutin depolymerization
Ethanol
Ethyl alcohol
Extraction
Filtration
Methyl alcohol
Recovery
Solvents
triterpenes
ursolic acid
title Efficient and selective method to separate triterpene acids by direct treatment of apple peels with alkaline ethanol
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