Particle size analysis of pristine food-grade titanium dioxide and E 171 in confectionery products: Interlaboratory testing of a SP-ICP-MS screening method and confirmation with transmission electron microscopy., Geiss, Otmar, Bianchi Ivana, Senaldi Chiara, Bucher Guillaume, Verleysen Eveline, Waegeneers Nadia, Brassinne Frederic, Mast Jan, Loeschner Katrin, Vidmar Janja, et al. , Food Control, 2021 Feb, Volume 120, (2021)