title: On-line micellar-enhanced spectrofluorimetric determination of rhodamine dye in cosmetics.
abstract: 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 x 10(-9) and 1 x 10(-6) mol L(-1), with a detection limit of 5 x 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.
authors: CONICET, Chacabuco y Pedernera, 5700 San Luis, Argentina.
authors: Chien Chun
authors: CC
authors: Wang
authors: Adriana N
authors: AN
authors: Masi
authors: Liliana
authors: L
authors: Fernández