How to analyze carboxylate groups in surfactants
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As the title suggests, it is a surfactant that contains benzene rings, polyether chains, and carboxylate groups. I would like to ask everyone how to quantitatively analyze the carboxylate groups – are there any specific methods or standards available?
1. If the only acidic species present in the sample are carboxylate ions, then the total acidity can be determined through non-aqueous titration； 2. Near-infrared spectroscopy is employed to suggest an analysis model for the sample, with analysis focused on carboxyl groups. Not all samples have ready-made standards or methods, but it is important to draw on some other analytical methods to address the immediate issues first. Even if there are standard methods, weren’t they also established through many experiments back when there were no such standards?