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ELPI+ Sintered Collection Plates
Sintered collection plates are designed to prevent common problems in impactor measurements: impactor overloading and particle bounce. Instead of collecting the particles on a smooth aluminium foil the collection area is vacuum oil embedded porous metal. When the particles are collected on the plates the oils seeps up due to capillary forces and thus the impaction always occurs to a liquid surface effectively eliminating bouncing.
Operating principle of the sintered collection plates.
The sintered collection plates are specially designed for measurements where the particles are particularly bouncy, such as salt or diesel soot after removal of volatile hydrocarbons. The use of sintered collection plates allows the user to collect up to 10 or 20 times more particle material when compared to normal collection plates without affecting the measured data.
More information on sintered collection plates you may find in:
Marjamäki, M. & Keskinen, J. 2004. Estimation on the cutpoint of an impactor with porous substrates. Technical Note. Journal of Aerosol Science, vol 35, pp 657-663.
van Gulijk, C., Marijnissen, J., Makkee, M. & Moulijn, J. 2003. Oil-soaked sintered impactors for the ELPI in diesel particulate measurements. Journal of Aerosol science, vol 32, pp. 635-640.
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