Deutsch: Umweltmatrix / Español: Matriz Ambiental / Português: Matriz Ambiental / Français: Matrice Environnementale / Italiano: Matrice Ambientale /

The Matrix is the material of which the sample is composed or the substrate containing the analyte of interest, such as drinking water, waste water, air, soilsediment, biological material, etc. It is also called medium or media.