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Identification de filtres solaires dérivés de l'acide para-aminobenzoique par spectroscopie RMN et par CPG/SM
Synopsis
Gas chromatography coupled with mass spectrometry and protonic nuclear magnetic resonance used directly or on fractions obtained by preparative thin layer chromatography, allow identification of the main molecule in commercial samples of PABA (Cas RN 150-13-0), PEG-25 PABA (Cas RN 116242-27-4), glyceryl PABA (Cas RN136-44-7), ethyl dihydroxypropyl PABA (Cas RN 58882-17-0) or octyl dimethyl PABA (Cas RN 21245-02-3).
Gas chromatography coupled with mass spectrometry and protonic nuclear magnetic resonance used directly or on fractions obtained by preparative thin layer chromatography, allow identification of the main molecule in commercial samples of PABA (Cas RN 150-13-0), PEG-25 PABA (Cas RN 116242-27-4), glyceryl PABA (Cas RN136-44-7), ethyl dihydroxypropyl PABA (Cas RN 58882-17-0) or octyl dimethyl PABA (Cas RN 21245-02-3).
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Keywords: PABA; PEG-25 PABA; UV absorbers; ethyl dihydroxypropyl PABA (INCI names); gas chromatography; glyceryl PABA; mass spectrometry; octyl dimethyl PABA; protonic NMR spectroscopy
Document Type: Research Article
Publication date: October 1, 2001
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