Microwave Digestion of wastewater according to EPA 3015A

A sample preparation method of wastewater for elemental analysis is introduced below. Wastewater samples are digested using speedwave XPERT in various vessel systems according to EPA Method 3015A. During the digestion, the reaction temperature and pressure are controlled via contactless in-situ temperature sensor (DIRC) and pressure sensor (OPC) to ensure efficient digestion. The applicability of various vessel types for the EPA 3015A method and the necessity of the OPC for eliminating undesired overpressures are explained.