@misc{10481/102487,
year = {2020},
month = {8},
url = {https://hdl.handle.net/10481/102487},
abstract = {Hibiscus sabdariffa L. is widely acknowledged as an important source of value-added compounds as natural
pigments and bioactive compounds whose isolation is of great interest in food industry. Due to the incessant
demand of green extraction procedures, NADESs have emerged in the last years as new green solvents alternative
to the conventional organic ones. The feasibility of NADESs for the extraction of value-added compounds of H.
sabdariffa has been assessed in this work for the first time. An extraction technique based on microwave assisted
extraction (MAE) and the use of NADESs was proposed testing different deep eutectic solvents based on choline
chloride (ChCl). Among them, oxalic acid based NADES exhibited a great selectivity for anthocyanins in particular
as well as higher extraction yields of bioactive compounds was also observed, even greater than those
observed by methanol. The effect of extraction variables such as liquid-solid ratio, temperature and water
percentage were studied by Box-Behnken design and a response surface methodology. The statistical program
pointed out the liquid-solid ratio of 1:30 mL mg−1, temperature of 75 °C and a water percentage of 55% as the
conditions to maximize extraction within the experimental domain. Hence, NADES composed by oxalic acid and
choline chloride resulted to be an effective green alternative tailor-made solvent to carry out selective extractions
of value-added compounds from H. sabdariffa.},
organization = {Spanish Ministry of Science, Innovation
and Universities (RTI2018-096724-B-C22)},
organization = {Government of
Castilla-La Mancha (SBPLY/17/180501/000509)},
organization = {M. Ivanović thanks
to the Slovenian Ministry of Education, Science and Sport for the postdoctoral contract: Raziskovalci na začetku kariere 2.1 (operation
OP20.04348)},
organization = {M.E. Alañón thanks to the University of Granada for
the grant awarded to researchers from other institutions},
publisher = {Elsevier},
keywords = {Natural deep eutectic solvents (NADES)},
keywords = {Hibiscus sabdariffa L.},
keywords = {Value-added compounds},
keywords = {Green extraction},
keywords = {Microwave-assisted extraction},
title = {A novel sustainable approach for the extraction of value-added compounds from hibiscus sabdariffa l. calyces by natural deep eutectic solvents},
doi = {10.1016/j.foodres.2020.109646},
author = {Alañón, María Elena and Ivanovic, M. and Pimentel Moral, Sandra and Borras Linares, María Isabel and Arráez Román, David and Segura Carretero, Antonio},
}