TY - JOUR
T1 - Impact of extraction parameters and concentration by nanofiltration on the recovery of phenolic compounds from Cynara cardunculus var. altilis
T2 - Assessment of antioxidant activity
AU - Brás, Teresa
AU - Guerreiro, Olinda
AU - Duarte, Maria F.
AU - Neves, Luísa A.
N1 - Sem PDF conforme despacho.
The authors acknowledge Fundação para a Ciência e a Tecnologia for the award of PhD grant to O. Guerreiro ( SFRH/BD/84406/2012 ) and also through grant no. PEst-C/EQB/LA0006/2011 . This work was partially supported by FCT research grant from Luísa Neves SFRH/BPD/64975/2009 . This research was co-financed by INALENTEJO 2007.2013/QREN , within the project BioEcos Project–Valorização Integrada de Biomassa ( ALENT-09-0140-FEDER-000705 )
PY - 2015/5/1
Y1 - 2015/5/1
N2 - Cynara cardunculus var. altilis has been reported to be an excellent source of phenolic compounds. Being extraction methodology a crucial step for final extract properties, batch solid-liquid extraction, the most commonly used method, was studied and parameters such as solvent concentration, stirring rate and sequential extraction were tested in order to understand their impact on: kinetic rate, total phenolic compounds concentration and extracts antioxidant activity. Profile of phenolic extraction of C. cardunculus appeared as a first order steady-state, being the kinetic rate influenced by solvent concentration, as well as by a lipophilic fraction removal, within a sequential extraction. Based on the high kinetic rate, and antioxidant activity, sequential extraction was therefore chosen as the best methodology for C. cardunculus phenolic compounds extraction. After extraction evaluation study, nanofiltration was used to concentrate phenolic extracts, having the results shown an increase on antioxidant activity, and on total phenolic compounds concentration, as well on chlorogenic acid levels.
AB - Cynara cardunculus var. altilis has been reported to be an excellent source of phenolic compounds. Being extraction methodology a crucial step for final extract properties, batch solid-liquid extraction, the most commonly used method, was studied and parameters such as solvent concentration, stirring rate and sequential extraction were tested in order to understand their impact on: kinetic rate, total phenolic compounds concentration and extracts antioxidant activity. Profile of phenolic extraction of C. cardunculus appeared as a first order steady-state, being the kinetic rate influenced by solvent concentration, as well as by a lipophilic fraction removal, within a sequential extraction. Based on the high kinetic rate, and antioxidant activity, sequential extraction was therefore chosen as the best methodology for C. cardunculus phenolic compounds extraction. After extraction evaluation study, nanofiltration was used to concentrate phenolic extracts, having the results shown an increase on antioxidant activity, and on total phenolic compounds concentration, as well on chlorogenic acid levels.
KW - Antioxidant activity
KW - C. cardunculus var. altilis
KW - Chlorogenic acid
KW - Nanofiltration
KW - Phenolic compounds extraction
UR - http://www.scopus.com/inward/record.url?scp=84922369935&partnerID=8YFLogxK
U2 - 10.1016/j.indcrop.2015.01.005
DO - 10.1016/j.indcrop.2015.01.005
M3 - Article
VL - 67
SP - 137
EP - 142
JO - Industrial Crops and Products
JF - Industrial Crops and Products
SN - 0926-6690
ER -