Identification of orcein and selected natural dyes in 14th and 15th century liturgical paraments with high-performance liquid chromatography coupled to the electrospray ionization tandem mass spectrometry (HPLC-ESI/MS/MS)
Keywords: Natural dyes; Liquid chromatography; Tandem mass spectrometry; Electrospray ionization; Indigo; Orcein; Medieval silk textiles;