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AbstractAbstract
[en] In a series of industrial processes ultrafine aerosol particles are generated (diameter < 0.02 μm). It is therfore vital to have techniques not only for the production of monodispersed, ultrafine particles but also for their detection. The developed generator operates according to the principle of atomizing salt solutions in a hydrogen flame. Quantity and concentration of the metallic salt solution sprayed into the hydrogen flame determine diameter and size distribution of the produced metallic oxide particles. More than 98% of the particles have a diameter < 0.008 μm. The particle number is measured by Aitken nuclei counter, that of the particle concentration by radioactive labeling and measuring of the activity. (orig.)
[de]
Bei einer Reihe von industriellen Prozessen treten ultrafeine Aerosolpartikeln auf, deren Durchmesser kleiner als 0,02 μm ist. Es ist deshalb wichtig, Verfahren zur Erzeugung monodisperser ultrafeiner Partikeln und zu deren Nachweis zu haben. Der entwickelte Generator arbeitet nach dem Prinzip des Flammenzerstaeubers. Menge und Konzentration der in die Wasserstoff-Flamme verspruehten Metallsalzloesung bestimmen Durchmesser und Groessenverteilung der erzeugten Metalloxidpartikeln. Mehr als 98% der Partikeln haben einen Durchmesser < 0,008 μm. Der Nachweis der Partikelzahl erfolgt mit dem Aitkenkernzaehler, der Partikelmasse durch radioaktive Markierung und Messung der Aktivitaet. (orig.)Original Title
Generator fuer ultra-feine monodisperse Aerosol-Partikeln
Source
5 figs.; 6 refs.
Record Type
Journal Article
Journal
Staub, Reinhalt. Luft; v. 36(2); p. 65-69
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Mitchell, J.P.
UKAEA Atomic Energy Establishment, Winfrith1983
UKAEA Atomic Energy Establishment, Winfrith1983
AbstractAbstract
[en] A spinning top aerosol generator has been used to generate monodisperse methylene blue particles in the size range from 0.6 to 6 μm. The number concentrations of these aerosols have been determined by means of an optical particle counter and compared with the equivalent measurements obtained by filter collection and microscopy. (author)
Primary Subject
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Feb 1983; 18 p
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Report
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AbstractAbstract
[en] An instrument was designed for measuring sodium aerosols concentrations using flame photometry. The instrument meets the requirements for long-term measurement. Sodium particles are heated in a hydrogen flame to the temperature required for excitation and they emit the characteristic yellow coloured flame. The hydrogen flame light containing sodium particles does not pass through a monochromatic spectral filter for the sodium spectral line to the pohotomultiplier cathode whose current is proportional to the intensity of the impacting light. The electronic part of the instrument consisting of replaceable modules is built using units available on the home market. (Kr)
Original Title
Meric koncentrace aerosolu sodiku
Record Type
Journal Article
Journal
Nukleon; (no.3); p. 56-58
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AbstractAbstract
[en] The investigation of the throw of the graphite aerosols and dusts in the air flow at different height has been made during 6 years. The measuring of the transportation parameters was carried out with the use of ground and air means of objective control (optical, laser, radio locator). It was revealed that the conditions of transboundary transportation of aerosols by air flow was in god agreement with barometric relief. It permits to use obtained information for prediction of aerosols transportation of the radionuclides storms
Original Title
Monitoring pyl'nykh byr' na territoriyakh, zagpyaznennykh radionyklidami
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Secondary Subject
Record Type
Journal Article
Journal
Vestnik Belorusskogo Gosudarstvennogo Universiteta. Seriya 2. Khimiya, Biologiya, Geografiya; ISSN 0372-5340;
; CODEN VBBKA3; v. 2; p. 71-74

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AbstractAbstract
[en] Standard monodisperse aerosols are required for the calibration of aerosol particle size analysers. A commercially available vibrating orifice aerosol generator has been commissioned to produce liquid and solid aerosols in the particle size range 2-30 μm. Various problems have been experienced during the operation of this equipment, particularly regarding the reliable generation of solid aerosols. The performance of the generator is reviewed in terms of the liquid feed, the orifice-jet requirements, the solvent evaporation and the solid aerosol drying characteristics. (orig.)
Source
Stoeber, W.; Hochrainer, D. (eds.); Gesellschaft fuer Aerosolforschung e.V., Bad Soden (Germany, F.R.); 319 p; 1981; p. 247-252; Conference on aerosols in science and technology - aerosols in and from industrial processes; Duisburg (Germany, F.R.); 23 - 25 Sep 1981
Record Type
Miscellaneous
Literature Type
Conference
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Horton, K.D.; Mitchell, J.P.
AEA Thermal Reactor Services, Winfrith (UK)1990
AEA Thermal Reactor Services, Winfrith (UK)1990
AbstractAbstract
[en] Andersen Mark-II and California Measurements PC-2 quartz-crystal (QCM) cascade impactors have been calibrated with monodisperse aerosol particles. Both the Andersen and QCM impactors were determined to be reliable instruments: the advantage of the QCM impactor is that real-time monitoring of aerosol behaviour is possible, using short measurement times. However, care is needed to interpret the QCM data if this instrument is used to sample aerosols that carry an unknown or significant electrostatic charge. (author)
Source
May 1990; 63 p; AEEW-TRS--5001
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Report
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Hurford, M.J.
UKAEA Atomic Energy Establishment, Winfrith1980
UKAEA Atomic Energy Establishment, Winfrith1980
AbstractAbstract
[en] Well defined standard aerosols are very important for the validation and evaluation of particle size analysis equipment. An important requirement for an aerosol studies laboratory is the ability to generate monodispersed aerosols in the 0.1 to 10 micron range to calibrate air samplers, and in particular the popular cascade impactors. The May spinning-top aerosol generator has been adapted to generate monodisperse solid aerosols in the size range 1 - 6 micron with a standard deviation of 1.1. The problems experienced during this development work are described in detail. The aerosols produced were studied by means of optical microscopy and the scanning electron microscope (SEM), and a comparison of these two techniques has been made. (U.K.)
Primary Subject
Source
Sep 1980; 26 p
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Report
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Dennis, R.
GCA Corp., Bedford, Mass. (USA). GCA Technology Div1976
GCA Corp., Bedford, Mass. (USA). GCA Technology Div1976
AbstractAbstract
[en] The subject of aerosols is discussed extensively under the following chapter headings: objectives, organization, and applications; aerosol generation; dynamic behavior of aerosols; optical properties of aerosols; sampling and particle-size measurement; and summary tables and graphs for static and dynamic characteristics of aerosol systems. A glossary, nomenclature, and index are included
Primary Subject
Source
1976; 148 p; ISBN 0 87079 024 2;
; Available from NTIS; Available from NTIS.

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Ajoy, K.C.; Dhanasekaran, A.; Sinha, Nitu; Suresh, K.; Bhaskar, S.; Rajagopal, V.; Achuthan, P., E-mail: ajoy@igcar.gov.in
Proceedings of the thirtieth IARP conference on radiological protection and safety in nuclear reactors and radiation installations: book of abstracts2012
Proceedings of the thirtieth IARP conference on radiological protection and safety in nuclear reactors and radiation installations: book of abstracts2012
AbstractAbstract
[en] Estimating the filter efficiency of HEPA filter units using DOP aerosols is a proven technique which is being extensively used for the in-situ testing of single filters and filter banks in active facilities. A dedicated, state of the art facility for testing various sizes of HEPA filter units is available at Indira Gandhi Centre for Atomic Research under Radiological Safety Division. Feasibility studies were carried out by incorporating a few additional arrangements in the existing filter test facility to explore the possibility of its use for testing the collection efficiency CAM filter heads. The modifications did not affect or hinder the intended utility of the filter test facility. The modifications done and the experimental technique are discussed in this paper
Primary Subject
Source
Sharma, D.N. (ed.) (Health Physics Division, Bhabha Atomic Research Centre, Mumbai (India)); Puranik, V.D. (ed.) (Environmental Assessment Division, Bhabha Atomic Research Centre, Mumbai (India)); Pushparaja (ed.) (Radiation Safety Systems Division, Bhabha Atomic Research Centre, Mumbai (India)) (and others); Indian Association of Radiation Protection, Bhabha Atomic Research Centre, Mumbai (India); 227 p; 2012; p. 6-7; IARPNC-2012: 30. IARP conference on radiological protection and safety in nuclear reactors and radiation installations; Mangalore (India); 15-17 Mar 2012
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Book
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Conference
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Stoeber, W.; Hochrainer, D.
Gesellschaft fuer Aerosolforschung e.V., Bad Soden (Germany, F.R.)1981
Gesellschaft fuer Aerosolforschung e.V., Bad Soden (Germany, F.R.)1981
AbstractAbstract
[en] This volume contains all papers presented at the 9th conference of the Association for Aerosol Research held in Duisburg, Germany F.R. in September 1981. This conference was attented by 160 participants and there were 39 oral and 16 poster presentations. For detailed hints see under relevant topics. (RW)
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Secondary Subject
Source
1981; 319 p; Conference on aerosols in science and technology - aerosols in and from industrial processes; Duisburg (Germany, F.R.); 23 - 25 Sep 1981
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Miscellaneous
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Conference
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