کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1162885 1490906 2016 11 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Towards a semiquantitative non invasive characterisation of Tyrian purple dye composition: Convergence of UV–Visible reflectance spectroscopy and fast-high temperature-high performance liquid chromatography with photodiode array detection
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آنالیزی یا شیمی تجزیه
پیش نمایش صفحه اول مقاله
Towards a semiquantitative non invasive characterisation of Tyrian purple dye composition: Convergence of UV–Visible reflectance spectroscopy and fast-high temperature-high performance liquid chromatography with photodiode array detection
چکیده انگلیسی


• Tyrian purple samples were analysed by UV–Vis spectroscopy and liquid chromatography.
• PLS regression was used to correlate spectral and chromatographic data.
• Excellent correlation factor and predictive power found for diBr-indigotin content.
• Tyrian purple may be non invasively identified through its UV–Vis spectrum.
• Hypothesis about mollusc species in archaeological samples was non invasively done.

In this paper, partial least square (PLS) regression is innovatively applied for a semi-quantitative non invasive study of the most precious dye of Antiquity: Tyrian purple. This original approach for the study of organic dyes in the cultural heritage field, is based on the correlation of spectrophotometric (UV–Visible) and chromatographic (Fast-HT-HPLC-PDA) data from an extensive set of textiles prepared with different snail species according to historical recipes. A cross-validated PLS model, based on the quantity of 6,6′-dibromoindigotin, displays an excellent correlation factor (R2Y = 0.987) between values determined by chromatography and those predicted from reflectance spectra. This indicates that the spectral features of Tyrian purple on textile fibre is strictly related to the amount of this indigoid component whose content may be non invasively predicted from reflectance spectrum. The studied correlation also highlights that, independently of the dyeing method and nature of the textile fibre used, the relative content of 6,6′-dibromindigotin may be used as a parameter to distinguish samples prepared with Hexaplex trunculus L. snails from those prepared with further mollusc species. To validate this model, archaeological textile fragments dating from the Roman period were successfully examined. The results achieved open an absolutely new way in Tyrian purple analysis in cultural heritage by non invasive spectroscopic techniques attesting their convergence with HPLC and giving them a semi-quantitative value.

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ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Analytica Chimica Acta - Volume 926, 5 July 2016, Pages 17–27
نویسندگان
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