Research Article

Simultaneous Preconcentration of Fast Green FCF and Rhodamine B Using Deep Eutectic Solvent and Determination via High-Performance Thin Layer Chromatography

Figure 5

Three-dimensional chromatograms of (a) fast green FCF in pastille and (b) rhodamine B in lipstick. (A), (B), and (C) are related to different concentrations of analytes based on the standard addition method.
(a)
(b)