Table 1. Average particle size and size distribution of food-grade TiO₂ particles (T3, T4) measured by FE-SEM

Sample	Average size(nm)	Distribution (Number %)
		100 nm	100-200 nm	>200 nm
T3	160.1±27.6a	ND	99	1
T4	120.3±24.1b	17	83	ND

Different lower-case letters (a,b) next to the values indicate significant difference between TiO₂ particles (T3, T4) (p<0.05). ND, not detected.