Adsorbentien als Ionenaustausch- und Trennmedien Al2O3 und SiO2 in der chromatographischen Tensidanalytik

Summary In addition to their properties of being able to separate organic substance groups, Al₂O₃ and SiO₂ have obviously the ability to bring about an ion exchange. Both of them can be used on thin layers as well as on adsorption columns. Al₂O₃ provides the anion exchange under the conditions described, while SiO₂ brings about the cation exchange. LAS and cation-active surfactants of type DSDMAC, which are nearly always to be found in municipal wastes and sewage sludge, and which often occur in flowing waters, can be very well separated from one another and from accompanying and hazardous substances with the aid of these adsorbents. Even detergents and other technical mixtures which contain surfactants can be decomposed into separate components (substance groups) and analyzed. It can be assumed that Al₂O₃ and SiO₂ can also bring about the ion exchange for other ionogenic substances.