Novel Fluorescent Membrane for Metronidazole Sensing Prepared by Covalent Immobilization of a Pyrenebutyric Acid Derivative
作者:Asigul Muhammad、Turghun Muhammad、Osmanjan Yimit、Burabiye Yakup
DOI:10.1007/s10895-013-1176-z
日期:2013.5
In the present paper, we report the fabrication of a new sensing membrane for fluorescence detection of metronidazole (MNZ). Briefly, a pyrenebutyric acid derivative, 2-(methacryloyloxy) ethyl-4-(1-pyrenyl) butanoate (MPB) with a double bond, was synthesized and copolymerized with 2-hydroxyethylmethacrylate (HEMA) on the activated glass surface by thermal initiation in the presence of cross-linker. The sensor responds linearly to metronidazole in the concentration range of 1.23~35.48 mg.L−1 in aqueous solution with a detection limit of 0.36 mg.L−1. The lifetime is enhanced by covalently immobilizing the pyrenebutyric acid derivative on glass slide, which hinders leaching of the dye from the membrane. The sensor could be regenerated after use by washing in methanol (RSD = 2.42 %), and it shows sufficient stability, and selectivity. Interference of other pharmaceuticals on membrane performance is discussed. The developed membrane has been successfully applied for the direct determination of metronidazole in human serum sample without pretreatment.
本文报道了一种用于甲硝唑(MNZ)荧光检测的新型传感膜的制备。简而言之,在交联剂存在下,通过热引发在活化玻璃表面合成并共聚了具有双键的芘丁酸衍生物2-(甲基丙烯酰氧基)乙基-4-(1-芘基)丁酸酯(MPB)和2-羟基乙基甲基丙烯酸酯(HEMA)。该传感器对浓度范围为1.23~35.48 mg.L−1的水溶液中的甲硝唑呈线性响应,检测限为0.36 mg.L−1。通过将芘丁酸衍生物共价固定在玻璃片上,可以提高使用寿命,从而防止染料从膜中浸出。该传感器在使用后可以通过甲醇洗涤(RSD=2.42%)进行再生,并且表现出足够的稳定性和选择性。讨论了其他药物对膜性能的干扰。所开发的膜已成功应用于无需预处理的人血清样品中甲硝唑的直接测定。