Abstract − Analytical Sciences, 21(8), 967 (2005).
Optochemical Sensor for an Ornidazole Assay Using 1-Amino-4-allyloxyanthraquinone as a Fluorescent Indicator
Shu-Zhen TAN,*,** Cheng-Gang NIU,*** Jian-Hui JIANG,* Guo-Li SHEN,* and Ru-Qin YU*
*State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, P. R. China
**Hunan Institute of Science and Technology, Yueyang, Hunan 414000, P. R. China
***Department of Environmental Science and Engineering, Hunan University, Changsha 410082, P. R. China
**Hunan Institute of Science and Technology, Yueyang, Hunan 414000, P. R. China
***Department of Environmental Science and Engineering, Hunan University, Changsha 410082, P. R. China
To improve the stability of optochemical sensors (optodes), the fluorescence indicator 1-amino-4-allyloxyanthraquinone (AAA), which was synthesized by reacting allyl bromide with 1-amino-4-hydroxyanthraquinone, was covalently immobilized on surface-modified glass slides. The resulting sensor was used to determine the content of ornidazole based on fluorescence quenching. It showed a linear response toward ornidazole in the concentration range of 9.0 × 10-6 to 1.0 × 10-3 mol L-1 with a detection limit of 8 × 10-6 mol L-1 at pH 7.5. This AAA-immobilized sensor has a rapid response, high stability and good selectivity to ornidazole.
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