Aside from being incredibly polar, its a surfactant and and emulsifier: might be tough. You could try cranking the pH up to around 10 to insure the amine is deprotonated and extract it into your favorite organic solvent. However, since its so basic, you might have some sort of luck with ion exchange chromatography. Alternatively, it has a pretty high BP, so if you have access to a vacuum pump or, even better, a lyophilizer you might be able to take the water out of the TEA instead of taking the TEA out of the water.