Ultrafine aerosols and nanoparticles at the workplace \Focus on IFA s work, No. 0302\ IFA

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Specifications	Ultrafine aerosols and nanoparticles at the workplace \Focus on IFA s work, No. 0302\ IFA
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0302 Edition 10/2011 617.0-IFA:638.3 Ultrafine aerosols and nanoparticles at the workplace – www.dguv.de/ifa/nano Probl

Specifications	Ultrafine aerosols and nanoparticles at the workplace \Focus on IFA s work, No. 0302\ IFA
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Content	0302 Edition 10/2011 617.0-IFA:638.3 Ultrafine aerosols and nanoparticles at the workplace – www.dguv.de/ifa/nano Problem Nanotechnology is regarded as a technology of the future. Nanoparticles are already being used in many products, such as sunscreen and composite materials for sports equipment. The worldwide value of products containing nanoparticles is expected to rise to US$1 trillion by 2015. The areas of application range from medicine, through surface finishing, to materials science and the chemical industry. Nanoparticles is the colloquial term for objects with two or three dimensions of between 1 and 100 nanometres (nm) and manufactured specifi- cally for their particular properties. In the OSH sector, nanoparticles are distinguished from ultrafine particles (UFPs), which have similar dimensions but are produced incidentally, for example during combustion processes. The atmospheric limit value for the respirable dust fraction explicitly excludes UFPs; a workplace limit value does not therefore exist, either for UFPs or for nanoparticles. In addition, the transport and mode of action of the particles within the human body remain inadequately researched. This is a serious obstacle to assessment of workplace exposure. Particular attention is currently being paid to fibrous nanoparticles such as carbon nanotubes (CNTs). Some of these CNTs may satisfy the defi- nition for WHO fibres (length > 5 µm, diameter < 3 µm, length to diameter ratio > 3:1). Left: single-walled carbon nanotube; right: titanium dioxide (scanning electron microscopic image of nanostructured material); image: Finnish Institute of Occupational Health (FIOH) Whether the health hazard presented by these CNTs is comparable to that of other WHO fibres is the subject of current research. Activities The IFA is a partner in a number of projects and measurement programmes. The completed EU Nanosafe2 and NANOSH projects for example specifically studied exposure to nanoparticles, whereas the current EU NanoDevice project is focused upon the further development of suitable measurement techniques. A measurement pro- gramme conducted by the German accident insur- ance institutions is concerned with exposure to ultrafine dusts. The knowledge and experience gained will be contributed to German and interna- tional working groups and standards committees, in order for a co-ordinated procedure to be imple- mented for the measurement and assessment of exposure to nanoparticles.
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