Influence of Oxidants on the Stability of Tocopherol in Model Nanoemulsions: Role of Interfacial Membrane Organized by Nonionic Emulsifiers

Table 2

The decomposition rate (k) of α-tocopherol in emulsions stabilized with emulsifiers having various sizes of hydrophilic and hydrophobic groups in presence of radicals.

	Emulsifier used for emulsion preparation
	P10L		P10S		P20S		P23L		P100S
	k (day^−1)	r^2	k (day^−1)	r^2	k (day^−1)	r^2	k (day^−1)	r^2	k (day^−1)	r^2
pH 7	^B0.0218^b	0.989	^B0.0252^a	0.984	^B0.0235^ab	0.967	^B0.0226^ab	0.985	^B0.0230^ab	0.951
pH 3	^A0.0312^bc	0.996	^A0.0319^b	0.994	^A0.0310^bc	0.988	^A0.0344^a	0.999	^A0.0293^c	0.995

P10L, polyoxyethylene 10 lauryl ether; P10S, polyoxyethylene 10 stearyl ether; P20S, polyoxyethylene 20 stearyl ether; P23L, polyoxyethylene 23 lauryl ether; P100S, polyoxyethylene 100 stearyl ether. The α-tocopherol decomposition rate values with different small letter superscripts in the same row are significantly different () by the Chow test. The α-tocopherol decomposition rate values with different capital letter superscripts in the same column are significantly different () by the Chow test.