Surface active agents - Determination of quaternary ammonium surface active agents in raw materials and formulated products - Potentiometric two-phase titration method; German version EN 14668:2005— 15 стр.
Surface active agents - Determination of quaternary ammonium surface active agents in raw materials and formulated products - Potentiometric two-phase titration method; German version EN 14668:2005, Corrigenda to DIN EN 14668:2005-09; German version EN 14668:2005/AC:2006— 2 стр.
