HPLC Analysis of Commercial Alkyl and Aryl Quaternary Ammonium Compounds used in Organoclay Type Rheological Additive

Abstract
Mixtures of aliphatic and aromatic “quats” can be qualitatively identified in a one step chromatographic run. After separation on a strong cation exchange column, the eluted components are detected using a UV and RI detector system in series. The quaternaries present in organoclays (e.g., BENTONE® type products) can also be identified by prior destruction of the silicate with hydrofluoric acid followed by chromatography of the residual quat fluorides.

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