German standard methods for the examination of water, waste water and sludge - Jointly determinable substances (group F) - Part 22: Determination of Glyphosate and Aminomethyl phosphic acid (AMPA) by high performance liquid chromatography (HPLC), post-column derivatization and fluorescence detection (F 22)
Deutsches Institut Fur Normung E.V. (German National Standard) , 10/01/2001