Call: +34 876 553 510
Email: bruna.freire@ufabc.edu.br
Address: c/Pedro Cerbuna 12, Universidad de Zaragoza, Facultad de Ciencias, Departamento de Química Analítica – Zaragoza (Spain)
ABOUT ME
Bruna Moreira Freire obtained her degree in Chemistry at the Federal Institute of São Paulo (Brazil) in 2016, and her Master degree in Science and Technology/Chemistry at the Federal University of ABC (Brazil) in 2019. She is currently a PhD student at the Federal University of ABC in the EnvironmetalsBR research group, in cotutelle with the MARTE research group at University of Zaragoza (Spain). Her research has been focused on multielement determination in biological, food and environmental samples using ICP-MS. Other topics of interest are the use of nanotechnology in agriculture and the method development for sizing nanoparticles in plant tissues by single particle ICP-MS (SP-ICP-MS).
PUBLICATIONS
2024
Freire, Bruna Moreira; Rua-Ibarz, Ana; Nakadi, Flávio Venâncio; Bolea-Fernandez, Eduardo; Barriuso-Vargas, Juan J.; Lange, Camila Neves; Aramendía, Maite; Batista, Bruno Lemos; Resano, Martín
Tracing isotopically labeled selenium nanoparticles in plants via single-particle ICP-mass spectrometry Journal Article
En: Talanta, vol. 277, pp. 126417, 2024, ISSN: 0039-9140.
@article{FREIRE2024126417,
title = {Tracing isotopically labeled selenium nanoparticles in plants via single-particle ICP-mass spectrometry},
author = {Bruna Moreira Freire and Ana Rua-Ibarz and Flávio Venâncio Nakadi and Eduardo Bolea-Fernandez and Juan J. Barriuso-Vargas and Camila Neves Lange and Maite Aramendía and Bruno Lemos Batista and Martín Resano},
url = {https://www.sciencedirect.com/science/article/pii/S0039914024007963},
doi = {https://doi.org/10.1016/j.talanta.2024.126417},
issn = {0039-9140},
year = {2024},
date = {2024-01-01},
journal = {Talanta},
volume = {277},
pages = {126417},
abstract = {Abstract
Agronomic biofortification using selenium nanoparticles (SeNPs) shows potential for addressing selenium deficiency but further research on SeNPs-plants interaction is required before it can be effectively used to improve nutritional quality. In this work, single-particle inductively coupled plasma-mass spectrometry (SP-ICP-MS) was used for tracing isotopically labeled SeNPs (82SeNPs) in Oryza sativa L. tissues. For this purpose, SeNPs with natural isotopic abundance and 82SeNPs were synthesized by a chemical method. The NPs characterization by transmission electron microscopy (TEM) confirmed that enriched NPs maintained the basic properties of unlabeled NPs, showing spherical shape, monodispersity, and sizes in the nano-range (82.8 ± 6.6 nm and 73.2 ± 4.4 nm for SeNPs and 82SeNPs, respectively). The use of 82SeNPs resulted in an 11-fold enhancement in the detection power for ICP-MS analysis, accompanied by an improvement in the signal-to-background ratio and a reduction of the size limits of detection from 89.9 to 39.9 nm in SP-ICP-MS analysis. This enabled 82SeNPs to be tracked in O. sativa L. plants cultivated under foliar application of 82SeNPs. Tracing studies combining SP-ICP-MS and TEM-energy-dispersive X-ray spectroscopy data confirmed the uptake of intact 82SeNPs by rice leaves, with most NPs remaining in the leaves and very few particles translocated to shoots and roots. Translocation of Se from leaves to roots and shoots was found to be lower when applied as NPs compared to selenite application. From the size distributions, as obtained by SP-ICP-MS, it can be concluded that a fraction of the 82SeNPs remained within the same size range as that of the applied NP suspension, while other fraction underwent an agglomeration process in the leaves, as confirmed by TEM images. This illustrates the potential of SP-ICP-MS analysis of isotopically enriched 82SeNPs for tracing NPs in the presence of background elements within complex plant matrices, providing important information about the uptake, accumulation, and biotransformation of SeNPs in rice plants.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
Agronomic biofortification using selenium nanoparticles (SeNPs) shows potential for addressing selenium deficiency but further research on SeNPs-plants interaction is required before it can be effectively used to improve nutritional quality. In this work, single-particle inductively coupled plasma-mass spectrometry (SP-ICP-MS) was used for tracing isotopically labeled SeNPs (82SeNPs) in Oryza sativa L. tissues. For this purpose, SeNPs with natural isotopic abundance and 82SeNPs were synthesized by a chemical method. The NPs characterization by transmission electron microscopy (TEM) confirmed that enriched NPs maintained the basic properties of unlabeled NPs, showing spherical shape, monodispersity, and sizes in the nano-range (82.8 ± 6.6 nm and 73.2 ± 4.4 nm for SeNPs and 82SeNPs, respectively). The use of 82SeNPs resulted in an 11-fold enhancement in the detection power for ICP-MS analysis, accompanied by an improvement in the signal-to-background ratio and a reduction of the size limits of detection from 89.9 to 39.9 nm in SP-ICP-MS analysis. This enabled 82SeNPs to be tracked in O. sativa L. plants cultivated under foliar application of 82SeNPs. Tracing studies combining SP-ICP-MS and TEM-energy-dispersive X-ray spectroscopy data confirmed the uptake of intact 82SeNPs by rice leaves, with most NPs remaining in the leaves and very few particles translocated to shoots and roots. Translocation of Se from leaves to roots and shoots was found to be lower when applied as NPs compared to selenite application. From the size distributions, as obtained by SP-ICP-MS, it can be concluded that a fraction of the 82SeNPs remained within the same size range as that of the applied NP suspension, while other fraction underwent an agglomeration process in the leaves, as confirmed by TEM images. This illustrates the potential of SP-ICP-MS analysis of isotopically enriched 82SeNPs for tracing NPs in the presence of background elements within complex plant matrices, providing important information about the uptake, accumulation, and biotransformation of SeNPs in rice plants.