Citation: M. Arens et al., DETERMINATION OF TENSIDES WITH TENSIDE-SE NSITIVE ELECTRODES - SURVEYBY A WORKING PARTY OF THE DGF .139. GERMAN STANDARD METHODS FOR INVESTIGATION OF FATS, FATTY PRODUCTS, TENSIDES AND RELATED MATERIALS .106.ANALYSIS OF SURFACE-ACTIVE COMPOUNDS .21., Fett, 96(3), 1994, pp. 107-112