Spectrofluorimetric determination of trace nitrite in food products with a new fluorescent probe 1,3,5,7-tetramethyl-2,6-dicarbethoxy-8-(3',4'-diaminophenyl)-difluoroboradiaza-s-indacene |
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Authors: | Huang Ke-Jing Wang Hong Guo Yue-Hong Fan Rong-Li Zhang Hua-Shan |
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Institution: | Department of Chemistry, Wuhan University, Wuhan 430072, China |
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Abstract: | A new fluorescent probe 1,3,5,7-tetramethyl-2,6-dicarbethoxy-8-(3′,4′-diaminophenyl)-difluoroboradiaza-s-indacene (TMDCDABODIPY) has been developed to detect nitrite in meat products and vegetables. The fluorescence of TMDCDABODIPY is very weak, but when it reacts with nitrite, a strong fluorescent triazole forms in aqueous medium at room temperature, which offers the advantage of specificity and sensitivity for the determination of nitrite. The fluorescence intensity was linear over a nitrite concentration of 9-300 nmol l−1 with a detection limit of 0.21 nmol l−1 (S/N = 3). The proposed method has been used for the determination of trace nitrite in food products with the recoveries of 94.62-105.48%. |
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Keywords: | 1 3 5 7-Tetramethyl-2 6-dicarbethoxy-8-(3&prime 4&prime -diaminophenyl)-difluoroboradiaza-s-indacence (TMDCDABODIPY) Fluorescent probe Spectrofluorimetry Nitrite |
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