Search results for "SP-ICP-MS"
showing 3 items of 3 documents
Human primary macrophages scavenge AuNPs and eliminate it through exosomes. A natural shuttling for nanomaterials.
2018
Abstract The use of nanomaterials is increasing but the real risk associated with their use in humans has to be defined. In fact, nanomaterials tend to accumulate in organs over a long period of time and are slowly degraded or eliminated by the body. Exosomes are nanovesicles actively shuttle molecules, including chemical products and metals, through the body. Macrophages scavenge the body from both organic and inorganic substances, and they use to release high amounts of exosomes. We hypothesized that macrophages may have a role in eliminating nanomaterials through their exosomes. We treated human primary macrophages with 20 nm gold nanoparticles (AuNPs), analyzing the presence of AuNPs in…
Nanodaļiņu noteikšana ar viendaļiņu induktīvi saistītās plazmas masspektrometrijas metodi pārtikas produktos
2021
Nanodaļiņu noteikšana ar viendaļiņu induktīvi saistītās plazmas masspektrometrijas metodi pārtikas produktos. Nečiporenko A., zinātniskais vadītājs Dr.chem. prof. Vadims Bartkevičs. Maģistra darbs, 46 lappuses, 24 attēli, 17 tabulas, 64 literatūras avoti, 13 pielikumi. Latviešu valodā. Darbā apkopota zinātniskā literatūra par nanodaļiņām, kas ietver to īpašības, toksiskumu, izplatību, pielietojumu, noteikšanas metodes un izmantošanu pārtikā. Literatūras daļā ir ietverts apkopojums par TiO2, Ag, ZnO un SiO2 nanodaļiņām. Darbā ir veikta TiO2, Ag, ZnO un SiO2 nanodaļiņu noteikšana pārtikas produktos ar SP-ICP-MS metodi, kā arī SP-ICP-MS instrumentālās metodes verificēšana ar Au nanodaļiņām.
Application of 3D printed scavengers for improving the accuracy of single-particle inductively coupled plasma mass spectrometry analyses of silver na…
2023
The determination of silver nanoparticles (Ag NPs) with single-particle inductively coupled plasma mass spectrometry can be severely interfered with coexisting dissolved silver causing high background signals, which can lead to inaccurate quantification of NP size and particle concentration. In this paper, chemically active and reusable 3D printed scavengers are applied for highly efficient dissolved silver removal in Ag NP dispersions, allowing more accurate determination of particle concentration and size. Selective laser sintering was used for constructing the porous 3D scavengers constituting of polystyrene used as a supporting material and ion-exchange material SiliaBond Tosic acid (TA…