Abstract
The lake pigments by means of the weld (Reseda luteola) and dyer's oak (Quercus infectoria) dye plants were prepared by using KAl(SO4)2 · 12H2O (alum), FeSO4 · 7H2O and SnCl2 · 2H2O mordants. A reversed-phase high performance liquid chromatography (RP-HPLC) with diode array detection (DAD) method was utilized for the identification of dyestuffs present in the lake pigments. The dyestuff extractions from the pigments were carried out with a solution mixture of 37% HCl:MeOH:H2O (2:1:1, v/v/v). The performed method is able to analyze and detect natural dyestuffs such as luteolin, apigenin, gallic acid, and ellagic acid present in the lake pigments.
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