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A Sequential Injection Method for the Determination of Tween-80 in Natural Water Samples Using a Fluorescence Enhancement of the Dye Eosin-B

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Abstract

A simple sequential injection (SI) method is reported for the determination of the non-ionic surfactant polyoxyethylene sorbitan monoleate (Tween-80). The proposed method is based on a fluorescence enhancement of the probe 4′,5′-dibromo-2′,7′-dinitro fluorescein, disodium salt (Eosin B) in the presence of a surfactant. The procedure is optimized using the univariate method of optimization. The optimum operating conditions are as follows: reagent concentration, 40 ppm; pH, 4.5; aspirated volumes of sample and reagent, 120 μL and 100 μL, respectively. With the optimum conditions described, linear calibration curves were obtained from 10–200 ppm. The detection limit was 1.7 ppm and the maximum relative standard deviation of the method was 2.7% (n = 5). The fluorescence excitation and emission were fixed at λex = 545 nm and λem = 585 nm. The method was successfully applied to the determination of (TW-80) in natural water samples.

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Authors and Affiliations

  1. Department of Chemistry, College of Science, Sultan Qaboos University, Box 36, Al-Khod, 123, Oman

    Salma M. Z. Al-Kindy, Fakhr Eldin O. Suliman, Salama B. Salama & Mohamed Aoudia

  2. Department of Biology, College of Science, Sultan Qaboos University, Box 36, Al-Khod, 123, Oman

    Seif N. Al-Bahry & Hamoud S. Al-Bahlany

Authors
  1. Salma M. Z. Al-Kindy
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  2. Fakhr Eldin O. Suliman
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  3. Salama B. Salama
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  4. Mohamed Aoudia
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  5. Seif N. Al-Bahry
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  6. Hamoud S. Al-Bahlany
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Correspondence to Salma M. Z. Al-Kindy.

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Al-Kindy, S.M.Z., Suliman, F.E.O., Salama, S.B. et al. A Sequential Injection Method for the Determination of Tween-80 in Natural Water Samples Using a Fluorescence Enhancement of the Dye Eosin-B. ANAL. SCI. 19, 737–742 (2003). https://doi.org/10.2116/analsci.19.737

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  • DOI: https://doi.org/10.2116/analsci.19.737

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