Method Development for the Elucidation of Amine Oxidation Products in the Aqueous Phase

The kinetics and products of the aqueous phase oxidation of small alkyl amines by the OH radical can be important in the atmosphere and in advanced oxidation processes in wastewater treatment. However, the relevant mechanisms and products are still uncertain and more powerful analytical techniques can be used to elucidate these. Hence, this research looks at the use of liquid chromatography mass spectrometry (LC-MS) and gas chromatography mass spectrometry (GC-MS) to identify and quantify the products of amine oxidation, which not only include smaller amines but also amides and carbonyls. Our approach includes developing and optimising a method that is compatible with not just the reaction conditions, but the instrument itself, as well as using derivatisation where necessary. The mass spectra will then help to identify the products, therefore leading to the ability to propose mechanisms for the oxidation of amines in the aqueous phase.