Determination of suspended matter in ambient air - Measurement of the mass concentration of As, Cd, Co, Cr, Cu, Ni, Pb, Sb, V und Zn as part of dust precipitation by atomic absorption spectrometry (AAS)
In this guideline a complete measurement method for determining the total contents of elements in the dust deposition is presented. Dust deposition within the meaning of this guideline denotes the dry residue of the atmospheric particulate matter input collected in a collecting vessel (so-called collecting pot) during the exposure period. The substance input of the metal and metalloid compounds bound to dust particles and contained in the precipitated water from the atmosphere into the collecting system is brought about by sedimentation. Typical deposition ranges are listed in Table 2. The selection of components to be determined was based e. g. on the elements listed in the 17th BImSchV and with reference to a number of relevant elements for the balancing of substance inputs in ecosystems. The limits of detection that can be attained with the measurement method described in this guideline allow also a number of elements to be determined in rural areas with low exposure levels.