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NMR analysis of some alkyl p-hydroxybenzoates.

Abstract By applying NMR spectrometry, a number of solutions containing unknown quantities of two or three alkyl p -hydroxybenzoates (parabens) in 60% polyethylene glycol in water were analyzed for quantification of the individual parabens.The method was found to be accurate, facile, and rapid and seems to possess a promising potential for applicability in related fields of pharmaceutical analysis.