Synthesis of Fe3O4 nanobead-functionalized 8-hydroxyquinoline sulfonic acid supported by an ion-imprinted biopolymer as a recognition site for Al3+ ions: estimation in human serum and water samples

被引:23
作者
El-Wekil, Mohamed M. [1 ]
Ali, Hassan Refat H. [1 ]
Marzouk, Adel A. [2 ]
Ali, Ramadan [3 ]
机构
[1] Assiut Univ, Dept Pharmaceut Analyt Chem, Fac Pharm, Assiut, Egypt
[2] Al Azhar Univ, Dept Pharmaceut Chem, Fac Pharm, Assiut, Egypt
[3] Al Azhar Univ, Dept Pharmaceut Analyt Chem, Fac Pharm, Assiut, Egypt
关键词
ON FLUORESCENT CHEMOSENSOR; ALUMINUM IONS; SCHIFF-BASE; SEPARATION; POLYMER; COMPLEX; SENSOR;
D O I
10.1039/c8nj01141a
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
Herein, a novel turn on ion-imprinted chemosensor for highly sensitive and selective detection of Al3+ ions in complex matrices has been developed. The method was based on using chitosan (CHIT) biopolymer/magnetite nanoparticles (MGNPs) functionalized with 8-hydroxyquinoline sulfonic acid (8-HQS) in the presence of Al3+ ions to synthesize a magnetite ion non-imprinted biopolymer (MGINIBP) chemosensor. This newly developed chemosensor was synthesized via polymerization of CHIT with [3-(2,3-epoxypropoxy)-propyl]trimethoxysilane [EPPTMS] in the presence of magnetite nanoparticles, 8-HQS, and an Al3+ ion template. The template was then removed from the sensor using 0.5 M NaF to form new recognition sites for Al3+. The newly developed chemosensor was termed as a magnetite ion-imprinted biopolymer (MGIIBP). Exposure of Al3+ ions to the developed system embedded with 8-HQS resulted in the formation of a fluorescent polymer, and emission maximum was obtained at 500 nm after excitation at 365 nm. Furthermore, with the increasing Al3+ ion concentration, the fluorescence intensity increases within the range 0.081-9.0 x 10(-8) M with a limit of detection (LOD) of 0.027 x 10(-8) M. In addition, the synthesized chemosensor was characterized by scanning electron microscopy (SEM), powder X-ray diffraction (PXRD), and Fourier-transform infrared spectroscopy (FTIR). The proposed MGIIBP sensor was successfully applied to the determination of Al3+ ions in water and human serum samples as model examples of complex natural matrix media.
引用
收藏
页码:9828 / 9836
页数:9
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