Résultats de la recherche - 10 results
Release of silver and titanium from face masks traded for the general population.
consumers. Direct measurement of release of Ag and TiO particles during normal wearing is problematic by the lack of methodology to test release and to quantify inhaled particles. Therefore in this study, we ...
Application of silver-based biocides in face masks intended for general use requires regulatory control
study optimized methodologies to characterize silver-based biocides directly in the face masks, by measuring their total silver content using ICP- MS and ICP- OES based methods, and by visualizing the ...
Agglomeration of titanium dioxide nanoparticles increases toxicological responses in vitro and in vivo
A toxicologically relevant definition of NM s is therefore not yet available, which affects not only the risk assessment process but also hinders the regulation of nano-products. In this study, we assessed the ...
Is aggregated synthetic amorphous silica toxicologically relevant?
different sizes, it appeared that aggregates > 100 nm were not necessarily less cytotoxic than their nano-sized counterparts. This study suggests that aggregates of SAS are toxicologically relevant for the ...
A systematic evaluation of Flow Field Flow Fractionation and single-particle ICP-MS to obtain the size distribution of organo-mineral iron oxyhydroxide colloids.
study was set up to determine the size of environmentally relevant FeOx colloids with new methods, i.e. Flow Field Flow Fractionation (FlFFF- UV- ICP- MS) and single-particle ICP- MS / MS (sp- ICP- MS) ...
Evaluation of a TEM based Approach for Size Measurement of Particulate (Nano)materials.
study included an assessment of the limit of detection, working range, selectivity, precision, trueness, robustness, and ruggedness. An uncertainty that was associated to intermediate precision in the ...
Evaluation of a TEM based Approach for Size Measurement of Particulate (Nano)materials
agglomeration state. The measurement of the median value of the minimal external particle diameter distribution was intra-laboratory validated. The validation study included an assessment of the limit of ...
Scientific opinion on the proposed amendment of the EU specifications for titanium dioxide (E 171) with respect to the inclusion of additional parameters related to its particle size distribution
studies with characterised E 171 are being carried out by interested business operators. Health Topics: Nanomaterials Nanomaterialen Nanomatériaux Service: Éléments traces et nanomatériaux Spoorelementen ...
Short-term biodistribution and clearance of intravenously administered silica nanoparticles
hours, silicon was mainly excreted through urine. Further studies are necessary to evaluate the toxicokinetics of different types of silica nanomaterials at lower exposure doses in order to be able to ...
Toxicology of silica nanoparticles: an update
selected and sorted based on in vitro and in vivo studies: to provide an update on SiNPs toxicity and to address the knowledge gaps indicated in the review of Napierska (Part Fibre Toxicol 7:39, 2010). ...