Titanium dioxide nanoparticles assessment in seaweeds by single particle inductively coupled plasma - Mass spectrometry

Juan José López-Mayán; Sergio Del-Ángel-Monroy; Elena Peña-Vázquez; María Carmen Barciela-Alonso; Pilar Bermejo-Barrera; Antonio Moreda-Piñeiro

doi:10.1016/j.talanta.2021.122856

Titanium dioxide nanoparticles assessment in seaweeds by single particle inductively coupled plasma - Mass spectrometry

Talanta. 2022 Jan 1:236:122856. doi: 10.1016/j.talanta.2021.122856. Epub 2021 Sep 6.

Authors

Juan José López-Mayán¹, Sergio Del-Ángel-Monroy², Elena Peña-Vázquez¹, María Carmen Barciela-Alonso¹, Pilar Bermejo-Barrera¹, Antonio Moreda-Piñeiro³

Affiliations

¹ Trace Element, Spectroscopy and Speciation Group (GETEE), Strategic Grouping in Materials (AEMAT), Department of Analytical Chemistry, Nutrition and Bromatology, Faculty of Chemistry, Universidade de Santiago de Compostela, Avenida das Ciencias, s/n, 15782, Santiago de Compostela, Spain.
² Trace Element, Spectroscopy and Speciation Group (GETEE), Strategic Grouping in Materials (AEMAT), Department of Analytical Chemistry, Nutrition and Bromatology, Faculty of Chemistry, Universidade de Santiago de Compostela, Avenida das Ciencias, s/n, 15782, Santiago de Compostela, Spain; Facultad de Estudios Superiores Zaragoza, Universidad Nacional de México, Av. Guelatao 66, Ejército de Oriente, Iztapalapa, 09230, Ciudad de México, Mexico.
³ Trace Element, Spectroscopy and Speciation Group (GETEE), Strategic Grouping in Materials (AEMAT), Department of Analytical Chemistry, Nutrition and Bromatology, Faculty of Chemistry, Universidade de Santiago de Compostela, Avenida das Ciencias, s/n, 15782, Santiago de Compostela, Spain. Electronic address: antonio.moreda@usc.es.

PMID: 34635240
DOI: 10.1016/j.talanta.2021.122856

Abstract

In this study, a first attempt for isolating and determining (characterising) background levels of titanium dioxide nanoparticles (TiO₂ NPs) in seaweed has been developed by using single particle inductively coupled plasma - mass spectrometry (SP-ICP-MS). Seaweeds were processed using an optimised ultrasound assisted extraction (UAE) procedure based on tetramethylammonium hydroxide (TMAH) before dilution and SP-ICP-MS analysis. The effect of the TMAH percentage in the extracting solution, as well as the volume of extracting solution and sonication (extraction) time, has been fully assessed. Additional experiments also showed that TiO₂ NPs were quantitatively released from the seaweed matrix in one UAE step since the analysis of residues gave TiO₂ NPs concentrations lower than the limit of quantification (LOQ) of the method. Validation of the method with 50 and 100 nm TiO₂ NPs (10 μg L^-1 as Ti) showed good analytical recovery (115% and 112% for 50 and 100 nm TiO₂ NPs, respectively), and good reproducibility (2% for size and 16% for number of TiO₂ NPs). Experiments regarding TiO₂ NPs stability showed that the extracted NPs are stable since there were not changes on the number of TiO₂ NPs and TiO₂ NPs size distributions when exposing TiO₂ NPs standards to the optimised extractive conditions.

Keywords: Alkaline extraction; Inductively coupled plasma; Mass spectrometry; Seaweed; Single particle; Titanium dioxide.

MeSH terms

Mass Spectrometry
Nanoparticles*
Reproducibility of Results
Seaweed*
Titanium

Substances

titanium dioxide
Titanium