RT Journal Article
T1 Direct solid sampling for speciation of Zn2+ and ZnO nanoparticles in  cosmetics by graphite furnace atomic absorption spectrometry
A1 García-Mesa, Juan Carlos
A1 Montoro-Leal, Pablo
A1 Rodríguez-Moreno, Andrés
A1 López Guerrero, María del Mar
A1 Vereda-Alonso, Elisa Isabel
K1 Productos cosméticos
AB The application of nanoparticles (NPs) in science and technology is a fast growing field. Therefore, reliable and straightforward analytical methods are required for their fast determination in different types of samples. This work investigates a method that enables the determination of ZnO NPs, discriminating them from ionic zinc in cosmetic samples. The method is based on direct solid sampling high-resolution continuum source electrothermal atomic absorption spectrometry (SS-HR-CS-GFAAS), and has been applied to determination of ZnO NPs, Zn2+and total Zn in eye shadow samples. In this work the deconvolution of the atomization peak and the calibration by standard additions have been done in order to discriminate and quantify ionic zinc and ZnO NPs. A Zn wavelength with low sensitivity was selected. The proper optimization of the graphite furnace temperature program, minimizing the mineralization of the sample matrix, enables different atomization profiles between the different chemical species of the analyte. Two multiple response surface designs have been used in order to optimize the adequate furnace program to achieve our aims. All the optimization experiments were performed using a sample of eye shadow. Further, a method for the determination of total Zn by direct solid sampling with calibration by aqueous standards, was also optimized. The optimized method was successfully applied to the determination of ionic Zn and ZnO NPs in different eye shadow samples, and has been validated by recovery assays, obtaining recovery percentages between 80 and 125%. Total Zn concentration in the solid samples was validated by the determination of total Zn by direct solid sampling and by the analysis of the same eye shadow samples digested in microwave oven.
PB Elsevier
YR 2021
FD 2021
LK https://hdl.handle.net/10630/36093
UL https://hdl.handle.net/10630/36093
LA eng
NO J.C. García-Mesa, P. Montoro-Leal, A. Rodríguez-Moreno, M.M. López Guerrero, E.I. Vereda Alonso, Direct solid sampling for speciation of Zn2+ and ZnO nanoparticles in cosmetics by graphite furnace atomic absorption spectrometry, Talanta, Volume 223, Part 1, 2021, 121795, ISSN 0039-9140, https://doi.org/10.1016/j.talanta.2020.121795
NO Universidad de Malaga (Proyecto Puente UMA), fondos FEDER, Junta de Andalucia, Proyecto UMA18FEDERJA060Ministerio de Ciencia y Tecnologia (fellowship FPU18/05371).
DS RIUMA. Repositorio Institucional de la Universidad de Málaga
RD 19 ene 2026