TiO2 nano- and micro-particles in commercial foundation creams: Field Flow-Fractionation techniques together with ICP-AES and SQW Voltammetry for their characterization

Catia Contado; Antonella Pagnoni

doi:10.1039/C0AY00205D

TiO₂ nano- and micro-particles in commercial foundation creams: Field Flow-Fractionation techniques together with ICP-AES and SQW Voltammetry for their characterization

Catia Contado*^a and Antonella Pagnoni^a

* Corresponding authors

^a Department of Chemistry, University of Ferrara, Via Luigi Borsari 46, Ferrara, I
E-mail: Catia.Contado@unife.it
Fax: +39 0532 240709
Tel: +39 0532 455149

Abstract

A procedure to determine the presence of nano- or micro- TiO₂ particles in commercial cosmetic formulations, which may have a daily use, is proposed. Two identification techniques the Square Wave Voltammetry (SWV) and ICP-AES were employed to determine the amount of TiO₂ in six foundation creams sold in Italy and the USA. A new SWV method, based on an acidic microwave-assisted digestion of the sample, has been set up and the results were compared and critically commented with those obtained by the established ICP-AES method. The analytical procedure was verified by analyzing the P-25 Degussa sample. The sizes of the particles contained in the foundations were investigated through Sedimentation (SdFFF) and Flow Field-Flow Fractionation (FlFFF) by analyzing aqueous slurries obtained from the foundation through a solvent extraction procedure. The FFF techniques synergically coupled with the ICP-AES made it possible to assess the sizes of the TiO₂ particles. The content of the extracted slurries was also checked by TEM observation.

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Publication details

The article was received on 30 Mar 2010, accepted on 10 May 2010 and first published on 10 Jun 2010

Article type: Paper

DOI: 10.1039/C0AY00205D

Citation: Anal. Methods, 2010,2, 1112-1124

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TiO₂ nano- and micro-particles in commercial foundation creams: Field Flow-Fractionation techniques together with ICP-AES and SQW Voltammetry for their characterization

C. Contado and A. Pagnoni, Anal. Methods, 2010, 2, 1112
DOI: 10.1039/C0AY00205D
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Analytical Methods

TiO₂ nano- and micro-particles in commercial foundation creams: Field Flow-Fractionation techniques together with ICP-AES and SQW Voltammetry for their characterization

Abstract

Supplementary files

Publication details

TiO₂ nano- and micro-particles in commercial foundation creams: Field Flow-Fractionation techniques together with ICP-AES and SQW Voltammetry for their characterization

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