formation of swollen lamellar structures, and electrostatic repulsion (Rydhag and Wilton 1981), resulting in a less resistive interfacial film in emulsions. This, in turn, can cause high oxygen diffusion into the oil. Under neutral pH conditions, PC and PE act as ampholytes, which contain both a negatively charged phosphate group and positively charged choline or ethanolamine, Judde B whereas PI contains only a negatively charged phosphate group nd uncharged inositol (Bosanac and others 2004; Wang and Wang 80 2008). Therefore, oxygen diffusion into the oil in emulsion is in creased by PI compared to PC or PE, causing higher production Koo l of singlet oxygen. This could have resulted in higher contact of PI than PC or PE with singlet oxygen, causing its faster degradation The antioxidant activity of PC during oxidation of water-in-oil Kristi microemulsion in the presence of chemically produced singlet o en was attributed to the reaction between PC and singlet oxygen chemical quenching (Lee and Choe 2008). The singlet oxygen L roniec and quenching rate by PC was reported to be 10 /M/s (B others 2011). There was no significant difference in degradation rate between PO and PE during chlorophyll-photosensitized oxi Mo dation, which was a similar result to that of wheat bran oil during photooxidation (Choi and Choe 2009)