TY - JOUR
T1 - Physicochemical and functional characterization of pectin extracted from Moroccan citrus peels
AU - El Fihry, Noussaire
AU - El Mabrouk, Khalil
AU - Eeckhout, Mia
AU - Schols, Henk A.
AU - Filali-Zegzouti, Younes
AU - Hajjaj, Hassan
PY - 2022/6/1
Y1 - 2022/6/1
N2 - Three Moroccan citrus peels, such as orange, lemon, and bigarade, were chosen to extract the pectin using Box Behnken Design. At a temperature of 90 °C, pH = 1.5, and extraction time = 120 min, a high pectin yield was recorded with 28.57, 26.86, and 26.55% for lemon (LPP), bigarade (BPP), and orange (OPP) peel pectins respectively. The extracted pectins have a less branched linear structure with high GalA contents for BPP (86.0 mol%), LPP (82.0 mol%), and OPP (79.0 mol%), and a high degree of methyl esterification (>74%), but a low degree of acetylation (<4%). A narrow and homogeneous distribution was recorded with a higher average Mw for LPP (90.0 kDa) than OPP (88.0 kDa) and BPP (80.0 kDa). One gram of Moroccan citrus pectin could hold more than 23.0 g of water. The high emulsifying activity was recorded for the three citrus pectins (∼50%), with higher emulsion stability for BPP pectin at 4 °C (94.42%). Furthermore, all extracted pectins exhibit a significantly non-Newtonian pseudoplastic behavior when the concentration increases. At 3% concentration, the apparent viscosity of BPP was higher than that of OPP and LPP with 40.26, 13.45, and 6.85 Pa s, respectively.
AB - Three Moroccan citrus peels, such as orange, lemon, and bigarade, were chosen to extract the pectin using Box Behnken Design. At a temperature of 90 °C, pH = 1.5, and extraction time = 120 min, a high pectin yield was recorded with 28.57, 26.86, and 26.55% for lemon (LPP), bigarade (BPP), and orange (OPP) peel pectins respectively. The extracted pectins have a less branched linear structure with high GalA contents for BPP (86.0 mol%), LPP (82.0 mol%), and OPP (79.0 mol%), and a high degree of methyl esterification (>74%), but a low degree of acetylation (<4%). A narrow and homogeneous distribution was recorded with a higher average Mw for LPP (90.0 kDa) than OPP (88.0 kDa) and BPP (80.0 kDa). One gram of Moroccan citrus pectin could hold more than 23.0 g of water. The high emulsifying activity was recorded for the three citrus pectins (∼50%), with higher emulsion stability for BPP pectin at 4 °C (94.42%). Furthermore, all extracted pectins exhibit a significantly non-Newtonian pseudoplastic behavior when the concentration increases. At 3% concentration, the apparent viscosity of BPP was higher than that of OPP and LPP with 40.26, 13.45, and 6.85 Pa s, respectively.
KW - Characterization
KW - Extraction
KW - Moroccan citrus pectin
KW - Optimization
U2 - 10.1016/j.lwt.2022.113508
DO - 10.1016/j.lwt.2022.113508
M3 - Article
AN - SCOPUS:85129304820
SN - 0023-6438
VL - 162
JO - LWT
JF - LWT
M1 - 113508
ER -