A definitive analytical spectroscopic study of Indian yellow, an ancient pigment used for dating purposes
The Raman spectrum of tartrazine has been mistakenly reported as being that of Indian yellow in the literature, which has serious consequences for the identification of this pigment in art works regarding their authentication. Unlike tartrazine, Indian yellow (a natural mixture of the magnesium and...
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2017
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| Acceso en línea: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_03790738_v271_n_p1_deFaria http://hdl.handle.net/20.500.12110/paper_03790738_v271_n_p1_deFaria |
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paper:paper_03790738_v271_n_p1_deFaria2023-06-08T15:40:35Z A definitive analytical spectroscopic study of Indian yellow, an ancient pigment used for dating purposes Artwork Indian yellow Pigment Raman spectroscopy Tartrazine tartrazine Article carbon nuclear magnetic resonance controlled study energy dispersive X ray spectroscopy heteronuclear multiple bond correlation heteronuclear single quantum coherence limit of quantitation nuclear Overhauser effect photon correlation spectroscopy priority journal proton nuclear magnetic resonance Raman spectrometry scanning electron microscopy X ray fluorescence The Raman spectrum of tartrazine has been mistakenly reported as being that of Indian yellow in the literature, which has serious consequences for the identification of this pigment in art works regarding their authentication. Unlike tartrazine, Indian yellow (a natural mixture of the magnesium and calcium salts of euxanthic acid) exhibits in its Raman spectrum a strong fluorescent background when visible excitation is used, however, excitation in the near infrared (1064 nm) permitted the observation of the Raman bands from the raw pigment with the main features placed at 1346, 1368, 1425, 1441 and 1626 cm−1. Indian yellow identification was assured by 1H and 13C Nuclear Magnetic Resonance characterization and the complete assignment of the proton and carbon resonances was accomplished using heteronuclear single quantum correlation (HSQC), heteronuclear multiple bond correlation (HMBC), nuclear overhauser effect spectroscopy (NOESY) and 1H–1H correlation spectroscopy (COSY). Scanning electron microscopy-energy dispersive spectroscopy (SEM-EDS) and X-ray fluorescence (XRF) analyzes were also conducted on a genuine sample of this historical pigment. © 2016 Elsevier Ireland Ltd 2017 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_03790738_v271_n_p1_deFaria http://hdl.handle.net/20.500.12110/paper_03790738_v271_n_p1_deFaria |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-134 |
| collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
Artwork Indian yellow Pigment Raman spectroscopy Tartrazine tartrazine Article carbon nuclear magnetic resonance controlled study energy dispersive X ray spectroscopy heteronuclear multiple bond correlation heteronuclear single quantum coherence limit of quantitation nuclear Overhauser effect photon correlation spectroscopy priority journal proton nuclear magnetic resonance Raman spectrometry scanning electron microscopy X ray fluorescence |
| spellingShingle |
Artwork Indian yellow Pigment Raman spectroscopy Tartrazine tartrazine Article carbon nuclear magnetic resonance controlled study energy dispersive X ray spectroscopy heteronuclear multiple bond correlation heteronuclear single quantum coherence limit of quantitation nuclear Overhauser effect photon correlation spectroscopy priority journal proton nuclear magnetic resonance Raman spectrometry scanning electron microscopy X ray fluorescence A definitive analytical spectroscopic study of Indian yellow, an ancient pigment used for dating purposes |
| topic_facet |
Artwork Indian yellow Pigment Raman spectroscopy Tartrazine tartrazine Article carbon nuclear magnetic resonance controlled study energy dispersive X ray spectroscopy heteronuclear multiple bond correlation heteronuclear single quantum coherence limit of quantitation nuclear Overhauser effect photon correlation spectroscopy priority journal proton nuclear magnetic resonance Raman spectrometry scanning electron microscopy X ray fluorescence |
| description |
The Raman spectrum of tartrazine has been mistakenly reported as being that of Indian yellow in the literature, which has serious consequences for the identification of this pigment in art works regarding their authentication. Unlike tartrazine, Indian yellow (a natural mixture of the magnesium and calcium salts of euxanthic acid) exhibits in its Raman spectrum a strong fluorescent background when visible excitation is used, however, excitation in the near infrared (1064 nm) permitted the observation of the Raman bands from the raw pigment with the main features placed at 1346, 1368, 1425, 1441 and 1626 cm−1. Indian yellow identification was assured by 1H and 13C Nuclear Magnetic Resonance characterization and the complete assignment of the proton and carbon resonances was accomplished using heteronuclear single quantum correlation (HSQC), heteronuclear multiple bond correlation (HMBC), nuclear overhauser effect spectroscopy (NOESY) and 1H–1H correlation spectroscopy (COSY). Scanning electron microscopy-energy dispersive spectroscopy (SEM-EDS) and X-ray fluorescence (XRF) analyzes were also conducted on a genuine sample of this historical pigment. © 2016 Elsevier Ireland Ltd |
| title |
A definitive analytical spectroscopic study of Indian yellow, an ancient pigment used for dating purposes |
| title_short |
A definitive analytical spectroscopic study of Indian yellow, an ancient pigment used for dating purposes |
| title_full |
A definitive analytical spectroscopic study of Indian yellow, an ancient pigment used for dating purposes |
| title_fullStr |
A definitive analytical spectroscopic study of Indian yellow, an ancient pigment used for dating purposes |
| title_full_unstemmed |
A definitive analytical spectroscopic study of Indian yellow, an ancient pigment used for dating purposes |
| title_sort |
definitive analytical spectroscopic study of indian yellow, an ancient pigment used for dating purposes |
| publishDate |
2017 |
| url |
https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_03790738_v271_n_p1_deFaria http://hdl.handle.net/20.500.12110/paper_03790738_v271_n_p1_deFaria |
| _version_ |
1768544870610239488 |