Evaluation of collision/reaction gases in single-particle ICP-MS for sizing selenium nanoparticles and assessment of their antibacterial activity

Freire Bruna Moreira; Cavalcanti Yasmin Tavares; Lange Camila NevesPieretti Joana ClaudioPereira Rodrigo MendesGoncalves Marcelly ChueNakazato GersonSeabra Amedea BarozziBatista Bruno Lemos

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Evaluation of collision/reaction gases in single-particle ICP-MS for sizing selenium nanoparticles and assessment of their antibacterial activity

机译：Evaluation of collision/reaction gases in single-particle ICP-MS for sizing selenium nanoparticles and assessment of their antibacterial activity

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Selenium nanoparticles (SeNPs) have recently attracted attention because they combine the benefits of Se and lower toxicity compared to other chemical forms of this element. In this study, SeNPs were synthesized by a green method using ascorbic acid as the reducing agent and polyvinyl alcohol as stabilizer. The nanoparticles were widely characterized. To determine the total concentration of Se by ICP-MS, several isotopes and the use of He as collision gas were evaluated, which was effective in minimizing interferences. A method for sizing SeNPs by single particle ICP-MS (SP-ICP-MS) was developed. For this purpose, He and H-2 were evaluated as collision/reaction gases, and the second one showed promising results, providing an average diameter of 48 nm for the SeNPs. These results agree with those obtained by TEM (50.1 nm). Therefore, the SP-ICP-MS can be implemented for characterizing SeNPs in terms of size and size distribution, being an important analytical tool for Se and other widely studied nanoparticles (e.g. Ag, Au, Ce, Cu, Fe, Zn). Finally, the antibacterial activity of SeNPs was assessed. The SeNPs showed bacteriostatic activity against three strains of Gram-positive bacteria and were particularly efficient in inhibiting the growth E. faecalis even at very low concentrations (MIC < 1.4 mg l(-1)). In addition, a bactericidal activity of SeNPs against S. aureus was observed. These nanoparticles may have potential application in pharmaceutical industry, biomedicine and agriculture.

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来源
《Nanotechnology》 |2022年第35期|共12页
作者
Freire Bruna Moreira; Cavalcanti Yasmin Tavares; Lange Camila NevesPieretti Joana ClaudioPereira Rodrigo MendesGoncalves Marcelly ChueNakazato GersonSeabra Amedea BarozziBatista Bruno Lemos;
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Fed Univ ABC UFABC;

Univ Estadual Londrina;

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原文格式 PDF
正文语种英语
中图分类特种结构材料;
关键词
metal nanoparticles; green synthesis; inductively coupled plasma mass spectrometry; bactericidal activity; SP-ICP-MS; collision; reaction cell; PLASMA-MASS SPECTROMETRY; COLLOID ANALYSIS; SIZE; EFFICIENCY;

Evaluation of collision/reaction gases in single-particle ICP-MS for sizing selenium nanoparticles and assessment of their antibacterial activity

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