Fritsche, U.U.Fritsche2022-03-082022-03-081991https://publica.fraunhofer.de/handle/publica/302530The invention relates to a passive collector for air pollution for the determination of emission rates for dry and wet deposits on construction materials such as natural stone, whereby the collector has a surrogate surface of the stone under investigation, the surrogate surface being linked to a collecting vessel such that any dry or wet contamination occurring can be collected.de608570610620660patent1990-4023063