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

Table 7

Determination of fast green FCF and rhodamine B in real samples via standard addition method.

Type of sample	Analyte	Added amount (µg·mL^−1)	Found amount (n = 3, µg·mL^−1)	Recovery (%)
Pastille	Fast green FCF	0.00	0.35 ± 0.01	—
	Rhodamine B	0.00	—	—
	Fast green FCF	0.20	0.58 ± 0.01	115.00
	Rhodamine B	0.05	0.047 ± 0.01	94.00
	Fast green FCF	0.40	0.81 ± 0.01	115.00
	Rhodamine B	0.15	0.11 ± 0.01	73.33
Lipstick	Rhodamine B	0.00	0.05 ± 0.01	—
	Fast green FCF	0.00	—	—
	Rhodamine B	0.40	0.48 ± 0.04	107.50
	Fast green FCF	0.25	0.26 ± 0.02	104.00
	Rhodamine B	0.80	0.96 ± 0.02	113.75
	Fast green FCF	0.45	0.43 ± 0.01	95.55