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Difference between centrifugation and filtration of eluates of leaching tests for polycyclic aromatic hydrocarbons (PAH), polychlorinated biphenyls (PCB) and organochlorine pesticides (OCB)

Verschil tussen centrifugeren en filtreren van de eluaten van uitloogproeven voor polycyclische aromatische koolwaterstoffen (PAK) organochloorbestrijdingsmiddelen (OCB) en polychloorbifenylen (PCB)

Synopsis

The research recorded in this report was carried out within the framework of the Target Plan for the normalization commission 39011 on 'Leaching characteristics of building and waste materials', aimed at developing leaching tests for organic components. Investigations resulted in the proposed publication of standard methods for leaching tests for PAH, PCB and organochlorine pesticides (OCB) in early 1996. In an investigation on the use of a centrifugal technique to separate particles from eluates, the RIVM found a method, using such a technique, to separate eluates from particles with a dimension greater than 0.45 mum. Important differences in concentration of particles, PAH, PCB or OCB were not found when comparing filtration and centrifugal techniques for eluates. A difference in loss of organic compounds was not indicated during the procedures. The RIVM therefore proposes the use of a filtration technique, since the technique is well-known to many laboratories. However, the centrifugal technique may be used.
 

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