Detection of Titanium Dioxide in Food
Raman spectroscopy is a rapid and easy method to identify titanium dioxide (E171), a white pigment widely used in the food and consumer goods industries.
Titanium dioxide is a white pigment which is used in paints, plastics, paper, pharmaceuticals, cosmetics, sunscreen, and toothpaste or as catalyst.[1,2,3]
In addition, it has been approved as a food additive (ingredient number E171) since 1969. The main food categories containing titanium dioxide are candy, bakery wares (esp. icing and decorations), chewing gum, ice cream, and cheese. Most food-grade titanium dioxide contains its anatase modification. It is highly stable towards various conditions (e.g. heat, light, pH) and thus unaffected by almost every type of food processing.
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 C. Rompelberg et al., Nanotoxicology, 2016, 10:10, 1404-1414.
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