Liquid chromatography–mass spectrometry analysis of dyes formed by in situ oxidative methods then purified by absorption and extraction from hair wefts

M John Plater* (Corresponding Author), Andrea Raab

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

The dye mixtures formed from three commercial hair colour formers were purified by absorption onto human hair wefts, washed and dried, extracted with dichloromethane: trifluoroacetic acid (75:25) and then analysed by liquid chromatography–mass spectrometry. Only 1–2 dyes were identified from each complex mixture of commercial aromatic amines along with a broad UV absorption mainly consisting of mixtures of quaternary ammonium salts from shampoos and some surfactants. Mecetronium ethyl sulfate and didecyldimethylammonium chloride were the main ammonium salts.
Original languageEnglish
Pages (from-to)450-461
Number of pages13
JournalJournal of Chemical Research
Volume45
Issue number5-6
Early online date13 Dec 2020
DOIs
Publication statusPublished - 1 May 2021

Keywords

  • hair wefts
  • hydrogen peroxide
  • phthalate
  • p-phenylenediamine
  • quaternary salt

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