Thin-Layer Chromatography (TLC) and HPTLC (High-performance-TLC) are widely used methods for the separation and identification of substances of a mixture. There is a mobile phase that is a composition of different solvents and a stationary phase which is a solid layer on glass plates. In most cases, this layer is made of silica gel. The… Read more »
In this communication, an attempt has been made to compare the two major classes of natural dyes Anthraquinoid and Indigoid with their synthetic analogs. Maddar (Rubia cordifolia and Rubia tinctoria) and Indigo (Indigofera tinctoria) dyes were used for this study. HPTLC imaging system ProViDoc DD 70 and densitometer CD60 (scanner) were used to identify the… Read more »