Table 1. Primary particle size analysis using TEM for commercial-grade E171and E171 isolated from selected foodstuffs and pharmaceuticals.

Sample Name	Primary Particle Size	Nano (%)
Commercial-grade E171	103 ± 40 nm	54%
Chewing gum	122 ± 49 nm	35%
Name-brand allergy pill	94 ± 25 nm	32%
Generic allergy pill	99 ± 40 nm	58%
Name-brand pain reliever pill	119 ± 39 nm	36%
Generic pain reliever pill	109 ± 39 nm	49%