<?xml version="1.0" encoding="UTF-8"?><xml><records><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>46</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Charlotte Wouters</style></author><author><style face="normal" font="default" size="100%">Lisa Siciliani</style></author><author><style face="normal" font="default" size="100%">Marina Ledecq</style></author><author><style face="normal" font="default" size="100%">Eveline Verleysen</style></author><author><style face="normal" font="default" size="100%">Jan Mast</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Identification and characterization of TiO2 nanoparticles in face masks by TEM</style></title><secondary-title><style face="normal" font="default" size="100%">Protocol Exchange</style></secondary-title></titles><keywords><keyword><style  face="normal" font="default" size="100%">Agglomerates</style></keyword><keyword><style  face="normal" font="default" size="100%">electron microscopy</style></keyword><keyword><style  face="normal" font="default" size="100%">energy dispersive X-ray spectroscopy</style></keyword><keyword><style  face="normal" font="default" size="100%">Face mask</style></keyword><keyword><style  face="normal" font="default" size="100%">image analysis</style></keyword><keyword><style  face="normal" font="default" size="100%">Nanoparticles</style></keyword><keyword><style  face="normal" font="default" size="100%">particle size distribution</style></keyword><keyword><style  face="normal" font="default" size="100%">STEMEDX</style></keyword><keyword><style  face="normal" font="default" size="100%">TEM</style></keyword><keyword><style  face="normal" font="default" size="100%">textile</style></keyword><keyword><style  face="normal" font="default" size="100%">ultramicrotomy</style></keyword></keywords><dates><year><style  face="normal" font="default" size="100%">2022</style></year><pub-dates><date><style  face="normal" font="default" size="100%">19/05/2022</style></date></pub-dates></dates><publisher><style face="normal" font="default" size="100%">Creative Commons</style></publisher><pub-location><style face="normal" font="default" size="100%">PO Box 1866, Mountain View, CA 94042</style></pub-location><pages><style face="normal" font="default" size="100%">17</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">&lt;p&gt;Because of the possible health risks related to the use of nanoparticle technologies in face masks, a general methodology is developed for identification, localization and particle size measurement of nanoparticles&amp;nbsp;in situ&amp;nbsp;in face masks by conventional and analytical transmission electron microscopy (TEM). The methodology can be applied by following this protocol which includes (i) preparation of resin-embedded ultra-thin sections of face masks suitable for TEM analysis, a procedure that can be applied to any type of textile, (ii) visualization and identification of the (nano)particles inside the cross section of the textile fibres by scanning TEM (STEM) combined with energy dispersive X-ray spectroscopy (EDX), (iii) measurement of the number-based particle size distribution based on a (semi-)automatic quantitative analysis using ImageJ, and (iv) in view of risk assessment, a calculation to estimate the amount of particles available for release from the mask.&lt;/p&gt;
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