A simple, rapid reversed-phase HPLC method for the determination of hydroquinone in skin-toning creams is described that is suitable for routine use. The sample is dissolved in methanol or methanol-light petroleum and directly injected without further purification. The method successfully passed a ruggedness test and was applied to a range of 35 creams.
J. Firth and I. Rix, Analyst, 1986, 111, 129 DOI: 10.1039/AN9861100129
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