A Sequential Injection Method for the Determination of Tween-80 in Natural Water Samples Using a Fluorescence Enhancement of the Dye Eosin-B
作者： Salma M.Z. AL-KINDY , Fakhr Eldin O. SULIMAN , Salama B. SALAMA , Mohamed AOUDIA , Seif N. AL-BAHRY
关键词: Reagent 、 Chromatography 、 Fluorescence 、 Analytical chemistry 、 Eosin B 、 Fluorescein 、 Detection limit 、 Calibration curve 、 Pulmonary surfactant 、 Chemistry 、 Sorbitan
摘要: A simple sequential injection (SI) method is reported for the determination of non-ionic surfactant polyoxyethylene sorbitan monoleate (Tween-80). The proposed based on a fluorescence enhancement probe 4′,5′-dibromo-2′,7′-dinitro fluorescein, disodium salt (Eosin B) in presence surfactant. procedure optimized using univariate optimization. optimum operating conditions are as follows: reagent concentration, 40 ppm; pH, 4.5; aspirated volumes sample and reagent, 120 μL 100 μL, respectively. With described, linear calibration curves were obtained from 10 - 200 ppm. detection limit was 1.7 ppm maximum relative standard deviation 2.7% (n = 5). excitation emission fixed at λex 545 nm λem 585 nm. successfully applied to (TW-80) natural water samples.
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