RT Conference Proceedings
T1 New methodologies to characterize ZnO nanoparticles in cosmetic samples
A1 García-Mesa, Juan Carlos
A1 Montoro-Leal, Pablo
A1 Morales-Benítez, Irene
A1 López-Guerrero, María del Mar
A1 Vereda-Alonso, Elisa Isabel
K1 Cinc - Compuestos - Congresos
K1 Radiación solar - Protección - Congresos
AB In recent years, based on their good properties as solar radiation filters and antibacterial agent, the useof zinc nanoparticles (ZnO NPs) in cosmetic industry has been increased. According to the literature, thepotential toxicity of these NPs could be size-dependent and also by the amount of solubilized metalfrom the NPs in solution. This work investigates new reliable and straightforward methodologies thatenables the determination of ZnO NPs, discriminating them from ionic zinc in cosmetic samples. Twodifferent strategies of analysis have been applied in this study: solid sampling high-resolution continuumsource electrothermal atomic absorption spectrometry (SS-HR-CS-GFAAS), and “single particle”inductively coupled plasma mass spectrometry (sp-ICP-MS). Triton X-100 has been used as a surfactant,for the formation of homogeneous and stable slurries, which allowed the determination of theconcentration and sizes of ZnO NPs in baby creams and eyeshadows. To achieve stable suspensions ofthe samples, two compound central design experiments (CCD) were performed to optimize theconcentration of Triton X-100 and sonication time. The concentration of each sample in the slurry wasadjusted considering the customer % ZnO content. The results of Zn 2+ and ZnO NPs contents achieved bythe two techniques were compared, and the total Zn content was analyzed by acid digestion of thesamples. A size comparison was also carried out with the data obtained with transmission electronmicroscopy (TEM).
YR 2022
FD 2022-08-29
LK https://hdl.handle.net/10630/25086
UL https://hdl.handle.net/10630/25086
LA eng
NO The authors thank “Plan Propio, Universidad de Málaga” for supporting this study and also FEDER fundsand Junta de Andalucia (Project UMA18-FEDERJA-060) for financial support of this work.Universidad de Málaga. Campus de Excelencia Internacional Andalucía Tech.
DS RIUMA. Repositorio Institucional de la Universidad de Málaga
RD 21 ene 2026