Environmental thin-layer reference materials of urban particulate matter on filter media

The Institute of Non-Ferrous Metals, Gliwice (Poland) has developed a process for uniform deposition of urban particulate matter on filter media which enables the production of reference materials for X-ray calibration by depositing certified reference materials on filters at different mass loadings. This process has been used to prepare the SRM 2783 for the National Institute of Standards and Technology, which consists of a set of five such filters based on the use of the SRM 1648 for the deposition.