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.

Supplementary files

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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