Mixtures containing any two quaternary ammonium salts

1 Mixtures containing any two quaternary ammonium salts The quats considered here fall into five groups  

Alkylpyridinium salts (and others with nitrogen in an aromatic ring) 

Quats whose hydrocarbon chains contain acid- or alkali-labile groups such as ester or amide. 

Mono- and dialkylammonium quats cannot be determined in mixtures 

Total active is determined by two-phase or potentiometric titration with sodium dodecyl sulphate (SDS), or with NaTPB at pH 3. This is the mandatory first step in all cases. 

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