Abstract
Microwave assistance is proposed for the first time in order to accelerate the extraction of biophenols from olive leaves. Under optimal working conditions, obtained using a multivariate methodology, complete extraction of the target analytes was achieved in 8 min. The extracts required no clean-up nor concentration prior to injection into a chromatograph–photodiode array detector assembly for individual separation–quantification. The optimal extractant (an 80:20 ethanol–water mixture) was also used in the development of a stirring-based extraction method which required around 24 h for complete extraction of the target compounds. These mixtures can be used as replacements for toxic extractants, with a view to exploiting olive leaves in order to obtain biophenols for human use.
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The Spanish Comisión Interministerial de Ciencia y Tecnología (CICyT) is gratefully acknowledged for financial support (project No. BQU-2002-13339).
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Japón-Luján, R., Luque-Rodríguez, J.M. & Luque de Castro, M.D. Multivariate optimisation of the microwave-assisted extraction of oleuropein and related biophenols from olive leaves. Anal Bioanal Chem 385, 753–759 (2006). https://doi.org/10.1007/s00216-006-0419-0
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DOI: https://doi.org/10.1007/s00216-006-0419-0