The guideline describes a sampling method for metals and semimetals as a constituent of the PM10 aerosol, a microwave pressure digestion of the sample in an oxidizing acid mixture and the analysis by means of the following three techniques: graphite tube atomic absorption spectrometry (GF-AAS), inductively coupled plasma mass spectrometry (ICP-MS ), Inductively Coupled Plasma Optical Emission Spectroscopy (ICP-OES).