DS EN 16159:2012 Animal Feeding Stuffs - Determination Of Selenium By Hydride Generation Atomic Absorption Spectrometry (Hgaas) After Microwave Digestion (Digestion With 65% Nitric Acid And 30% Hydrogen Peroxide) Defines a method for the determination of selenium in animal feeding stuffs by hydride generation atomic absorption spectrometry (HGAAS) after microwave pressure digestion.