Surface active agents - Determination of N-(3-dimethylaminopropyl)-alkylamide content in alkylamidopropylbetaines - Gas chromatographic method; German version EN 14881:2005— 14 стр.
Animal and vegetable fats and oils - Determination of acid value and acidity (ISO 660:1996 + Amd 1:2003); German version EN ISO 660:1999 + A1:2005— 18 стр.