Abstract
Quaternary pyridinium salts with chains ranging from C8 to C20 belong in the large group of cationic surfactants. In this paper, the preparation of such cationic surface active agents based on the pyridinium moiety and differing in the length of the N-alkyl chain is described. Additionally, HPLC technique was established to distinguish each prepared pyridinium analogue. This study represents universal method for preparation and identification of quaternary pyridinium detergents.
Highlights
Cationic surfactants offer a huge amount of applications for industry
C18-C20 alkyl chains were contaminated with starting material that was detected by TLC
HPLC method was able to distinguish among all prepared quaternary pyridinium salts (Figure 2)
Summary
Cationic surfactants offer a huge amount of applications for industry. They are frequently used in analytical and physical chemistry. Some pyridinium salts are used as disinfectants in various medical applications (e.g., eye drops, solutions, foams) In this field, quaternary pyridinium salts are compounds of high interest, on account of their similarity to benzalkonium salts [1]. Some pyridinium salts (C12 and C16) were used as solubilizers for water insoluble compounds in Analytical Chemistry Such surfactants were employed in Molecules 2010, 15 the complexes with dyes to determine the type and concentration of electrolytes by a spectrophotometric method [3]. A method describing spray application of a compound with a C16 side chain on the pyridinium ring (cetylpyridinium, CP) for protection of the poultry against bacterial contamination has been published [4]. This method was successfully applied for the preparation of the described pyridinium salts
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