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Alnajjar AO, Ahmed Elbashir A, Elgorashe RE, Ebrahim AM, Idris AM, Abd El-Lateef HM. Utilization of 4-fluoro-7-nitro-2,1,3-benzoxadiazole (NBD-F) as a fluorogenic reagent for the development of a spectrofluorometric assay method for taurine in energy drinks. JOURNAL OF CHEMICAL RESEARCH 2022. [DOI: 10.1177/17475198221114760] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
The development of a simple, inexpensive, sensitive, and selective spectrofluorometric assay method for taurine in energy drinks utilizing 4-fluoro-7-nitro-2,1,3-benzoxadiazole as a fluorogenic agent is described. Conditions affecting the derivatization reaction are investigated and optimized. The optimal conditions are found to be as follows: buffer, pH 10; 4-fluoro-7-nitro-2,1,3-benzoxadiazoleconcentration, 0.05%; reaction time, 30 min; temperature, 50 °C. Fluorescence measurements are carried out at a wavelength of 542 nm, with excitation at a wavelength of 485 nm. The method is validated under the optimum conditions. The method is found to be linear in the range of 2.0–12.5 µg/mL, with a correlation coefficient of 0.9993. The limits of detection and quantification (µg/mL) are 0.6 and 2.02, respectively, which are appropriate for taurine assays in commercial energy drinks. In addition, the proposed method recorded excellent accuracy since the recovery values caused by presence of excipients are found to be in the range of 99.3%–102.87%. The values of relative standard deviation for intra- and inter-day precision were found to be in the ranges of 0.236%–0.659% and 2.12%–2.63%, respectively.
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Affiliation(s)
- Ahmed O Alnajjar
- Department of Chemistry, College of Science, King Faisal University, Al-Ahsa, Saudi Arabia
| | | | - Rafea Elgack Elgorashe
- Department of Chemistry, College of Science, King Faisal University, Al-Ahsa, Saudi Arabia
| | - Ammar M Ebrahim
- Consultants Unit, Research and Consulting Institute, King Faisal University, Al-Ahsa, Saudi Arabia
| | - Abubakr M Idris
- Department of Chemistry, College of Science, King Khalid University, Abha, Saudi Arabia
- Research Center for Advanced Materials Science (RCAMS), King Khalid University, Abha, Saudi Arabia
| | - Hany M Abd El-Lateef
- Department of Chemistry, College of Science, King Faisal University, Al-Ahsa, Saudi Arabia
- Department of Chemistry, Faculty of Science, Sohag University, Sohag, Egypt
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Zhu X, Li M, Wang R, Tian F, Chen Y. Influence of Dimethyl Sulfoxide and H2O on Hantzsch Reaction and Its Application in Pharmaceutical Analysis. RUSS J GEN CHEM+ 2022. [DOI: 10.1134/s1070363221130417] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Farag AS, Klikarová J, Česlová L, Vytřas K, Sýs M. Voltammetric determination of taurine in energy drinks after o-phthalaldehyde-ethanethiol derivatization. Talanta 2019; 202:486-493. [DOI: 10.1016/j.talanta.2019.04.083] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2019] [Revised: 04/26/2019] [Accepted: 04/30/2019] [Indexed: 01/03/2023]
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