Trace metals are minerals present in living tissues in small amounts. There are 2 types of trace metals: nutritionally essential and nonessential. These metals act as catalysts in enzyme systems and participate in oxidation-reduction reactions in energy metabolism.

Solvents can be inhaled or absorbed through the skin. Individuals with certain occupations, such as painters, dry cleaners, auto mechanics, printers, and laboratory technicians are more at risk than others. Eurofins Clinical Diagnostics Ireland tests for a range of solvents, including benzene, cyclohexane, cyclohexanone, dichloromethane, methyl ethyl ketone, perchloroethylene and xylene.