ON-LINE MICELLAR ENHANCED SPECTROFLUORIMETRIC DETERMINATION OF RHODAMINE DYE IN COSMETICS

WANG, CHIEN CHUN; MASI, ADRIANA; FERNÁNDEZ, LILIANA

TALANTA

Elsevier

Año: 2007 vol. 75 p. 135 - 140

0039-9140

A simple FI-fluorimetric analytical methodology for the continuous and sequential determination of rhodamine B (RhB) in cosmetic products has been developed and evaluated in terms of sensibility and selectivity. The influence of several surfactant solutions on RhB fluorescence signal has been studied; particular attention was paid in the aggregation behavior of RhB–SDS system. Linear response has been obtained in the range of 1.6×10-9 and 1×10-6 mol L-1, with a detection limit of 5×10-10 mol L-1. The novel technique provides a simple dissolution of sample, on-line filtration with sampling rate higher than 100 samples h-1 and has been satisfactorily applied to the RhB determination in commercial lipsticks