Abstract
Liquid chromatography?mass spectrometry has been used to analyse a range of cationic aniline dyes from the 19th century. Mauveine from the Chandler museum is used as a standard for comparison. This consists of a typical W. H. Perkin mixture of mauveine A and B. Mauveine from a historic collection in Dresden is different and consists of mainly mauveine A and a monomethyl mauveine chromophore. Possible synthetic routes and its significance are discussed. Three samples of phenylated rosanilines have been analysed, and a list of 19 possible components compiled. An analysis by liquid chromatography?mass spectrometry works well on this complex mixture giving clear information on retention times and accurate mass molecular weights. Mono-, di- and triphenylrosanilines are present in two samples, and a third sample has mainly monophenylrosaniline. In each sample, a small amount of higher molecular weight homologues appear. The thin-layer chromatography plate, from left to right, has fuchsin or rosaniline then mono-, di- and triphenylrosaniline. The two spots on the right-hand side are blue, and the two spots on the left-hand side are red.
Original language | English |
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Pages (from-to) | 326-335 |
Number of pages | 10 |
Journal | Journal of Chemical Research |
Volume | 44 |
Issue number | 5-6 |
Early online date | 27 Jan 2020 |
DOIs | |
Publication status | Published - 1 May 2020 |
Bibliographical note
Open Access via the Jisc Sage AgreementAcknowledgements
We are grateful to Prof. Dr. Horst Hartmann of the Historische Farbstoffsammlung, Technische Universität Dresden and to the Chandler museum, New York, for samples to analyse.
Declaration of conflicting interests
The author(s) declared no potential conflicts of interest with respect to the research, authorship, and/or publication of this article.
Funding
The author(s) received no financial support for the research, authorship, and/or publication of this article.
Keywords
- aniline blue
- fuchsin
- mauveine
- rosaniline
- triphenylrosaniline