TY - JOUR
T1 - Influence of cations, pH and dispersed phases on pectin emulsification properties
AU - Uruncuoglu, Serife
AU - Alba, Katerina
AU - Morris, Gordon
AU - Kontogiorgos, Vassilis
N1 - Publisher Copyright:
© 2021 The Author(s)
Copyright:
Copyright 2021 Elsevier B.V., All rights reserved.
PY - 2021/6/5
Y1 - 2021/6/5
N2 - The cooperativity of six cations (Ca2+, Mg2+, Zn2+, Al3+, Cr3+ and Fe3+), three pectins (sugar beet, high and low methyl esterified), three dispersed phases (medium chain triglycerides (MCT), orange oil and hexadecane), time (30 days) and pH (2.0 and 6.0) has been investigated in the formation and stability against coarsening of oil-in-water emulsions. Cations generally influenced emulsion stability in the following order (most stable) Ca2+ > Mg2+ > Al3+ > Cr3+ > Zn2+ > Fe3+ (least stable). This order largely coincided with that of the strength of pectin-cation interactions showing that the higher the affinity of cation for pectin the less stable the emulsion. More stable emulsions were formed with sugar beet pectin, which was also unresponsive to the presence of cations, followed by high- and then low-methyl esterified samples. At pH 2.0 all pectins showed their best emulsification performance whereas shifting pH to 6.0 severely impaired emulsification capacity and longer term stability against droplet growth. Smaller droplets were created with hexadecane under all conditions studied followed by MCT and orange oil in agreement with their aqueous solubilities. The present results advance our understanding of the stabilisation of emulsions using pectin and allow us to tailor their functionality for applications in food, pharmaceutical and biomedical industries.
AB - The cooperativity of six cations (Ca2+, Mg2+, Zn2+, Al3+, Cr3+ and Fe3+), three pectins (sugar beet, high and low methyl esterified), three dispersed phases (medium chain triglycerides (MCT), orange oil and hexadecane), time (30 days) and pH (2.0 and 6.0) has been investigated in the formation and stability against coarsening of oil-in-water emulsions. Cations generally influenced emulsion stability in the following order (most stable) Ca2+ > Mg2+ > Al3+ > Cr3+ > Zn2+ > Fe3+ (least stable). This order largely coincided with that of the strength of pectin-cation interactions showing that the higher the affinity of cation for pectin the less stable the emulsion. More stable emulsions were formed with sugar beet pectin, which was also unresponsive to the presence of cations, followed by high- and then low-methyl esterified samples. At pH 2.0 all pectins showed their best emulsification performance whereas shifting pH to 6.0 severely impaired emulsification capacity and longer term stability against droplet growth. Smaller droplets were created with hexadecane under all conditions studied followed by MCT and orange oil in agreement with their aqueous solubilities. The present results advance our understanding of the stabilisation of emulsions using pectin and allow us to tailor their functionality for applications in food, pharmaceutical and biomedical industries.
KW - Pectin
KW - Emulsion
KW - Orange oil
KW - Cation
UR - http://www.scopus.com/inward/record.url?scp=85107675944&partnerID=8YFLogxK
U2 - 10.1016/j.crfs.2021.05.008
DO - 10.1016/j.crfs.2021.05.008
M3 - Article
VL - 4
SP - 398
EP - 404
JO - Current Research in Food Science
JF - Current Research in Food Science
SN - 2665-9271
ER -