Abstract
In the last decade, ionic liquids have shown great promise in a plethora of applications. Nevertheless, little attention has been paid to the characterization of the purity of these fluids, which ultimately lead to non-reproducible data in the literature. Derivatization with carbon disulfide is used to quantitatively determine primary and secondary non-aromatic amines (detection limit: 0.2 wt%), such as 1-butylamine, morpholine or pyrrolidine, in ionic liquids. The corresponding dithiocarbamates formed are analyzed by ultraviolet spectroscopy at wavelengths between 277 and 285 nm.
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