Design of a Flow-Through Voltammetric Sensor Based on an Antimony-Modified Silver Electrode for Determining Lithol Rubine B in Cosmetics

Table 1

Analytical results of the determination of Lithol Rubine B in commercial cosmetics by liquid chromatography with electrochemical detection (LC-EC) and ultraviolet detection (LC-UV).

Samples	Concentration (%, w/w)
	Lithol Rubine B
	LC-EC	LC-UV
	𝑁=3^a
Rouge	0.104 (2.0 %)^b	0.119 (1.3 %)
Lipstick	0.250 (1.2 %)	0.220 (1.0 %)
Nail preparation	0.300 (2.1 %)	0.310 (2.3 %)

^aNumber of determinations.
^bValues in parentheses indicate R. S. D.