Heavy metals are examined in the Tehnolab laboratory using inductively coupled plasma emission spectrometry (ICP-OES). This method in the Tehnolab laboratory is also accredited for a flexible range, and using this method, heavy metals can be tested in samples of underground or surface water, sewerage water, drinking water, soil and solid waste, plant and animal material, mineral, geological and metallurgical samples, air samples, as well as items for general use and industrial chemicals.