Tjc. Arts et al., ZETA POTENTIALS OF TRISTEAROYLGLYCEROL CRYSTALS IN OLIVE OIL, Colloids and surfaces. A, Physicochemical and engineering aspects, 85(2-3), 1994, pp. 149-158
The zeta potential of tristcaroylglycerol crystals suspended in olive
oil was determined by means of electrophoretic light scattering at hig
h field strengths. The effects of various additives (electrolytes, fat
ty acids, monoacylglycerols, phospholipids) to the oil phase were inve
stigated. The zeta potentials were generally found to be positive and
were strongly influenced by the presence of contaminants or additives.
Their values appear to be determined by the presence of native or ads
orbed proton acceptor groups on the crystal surface. Phosphatidylcholi
ne proved to be the most effective additive: addition of 0.045% (w/w)
to the oil raised the zeta potential from about 10 to 60 mV.