共 23 条
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.
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页码:9828 / 9836
页数:9
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