Detection and characterization of SiO2 and TiO2 nanostructures in dietary supplements

Journal of Agricultural and Food Chemistry
Jin-Hee LimSean W Linder

Abstract

Nanomaterials are beginning to enter our daily lives through various consumer products as the result of technology commercialization. The development of methodologies to detect the presence of nanomaterials in consumer products is an essential element in understanding our exposure. In this study, we have developed methods for the separation and characterization of silicon dioxide (SiO2) and titanium dioxide (TiO2) nanostructures in dietary supplements marketed in products specifically targeted for women. A total of 12 commercial products claiming the inclusion of SiO2 and TiO2, but not making any claims regarding the particle size, were randomly selected for purchase through various retailers. To isolate nanostructures from these products, a simple methodology that combines acid digestion and centrifugation was utilized. Once isolated, the chemical composition, size, morphology, and crystal structure were characterized using mass spectroscopy, light scattering, electron microscopy, and X-ray diffraction techniques. SiO2 and TiO2 nanostructures were detected in 11 of 12 products using these methods. Many of the isolated nanoscale materials showed a high degree of aggregation; however, identified individual structures had at leas...Continue Reading

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Citations

Aug 25, 2015·Frontiers in Chemistry·Catia Contado
Jan 30, 2020·Nanotoxicology·Ruud J B PetersMartijn van der Lee
Apr 15, 2019·Biological Trace Element Research·Ewa Baranowska-WójcikAnna Winiarska-Mieczan
Mar 7, 2020·Environmental Science. Nano·Glen M DeLoidPhilip Demokritou
Feb 5, 2021·Designed Monomers and Polymers·Soad Z Alsheheri
Mar 7, 2020·Journal of Trace Elements in Medicine and Biology : Organ of the Society for Minerals and Trace Elements (GMS)·Mohamed M HashemAhmed Bahy-El-Dien
Aug 12, 2021·Journal of Agricultural and Food Chemistry·Qian LiDavid Julian McClements
Aug 8, 2017·Journal of Agricultural and Food Chemistry·Haitao WangMingqian Tan
Dec 5, 2018·Journal of Agricultural and Food Chemistry·Jin-Hee LimAndrew Fong
Aug 29, 2021·Ecotoxicology and Environmental Safety·Yaowen LiuKangJu Lee

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