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基于酪氨酸酶-氧化石墨烯的生物传感器的制备及应用

, PP. 79-83

Keywords: 酪氨酸酶,氧化石墨烯,邻苯二酚,生物传感器

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Abstract:

研制了基于酪氨酸酶和氧化石墨烯修饰丝网印刷电极的生物传感器,并用于水中邻苯二酚的测定.1-芘丁酸琥珀酰亚胺酯分子通过非共价的π-π堆积作用吸附到氧化石墨烯上,酪氨酸酶与1-芘丁酸琥珀酰亚胺酯形成酰胺键,组装到氧化石墨烯上,制得纳米复合材料.该材料为酪氨酸酶的固定提供了有利的微环境,并且能很好地保持其生物活性.传感器对邻苯二酚响应灵敏、快速,达到稳态电流时间在9s以内.实验结果表明,传感器的重现性、选择性和稳定性良好,检测线性范围为8.1×10-8mol/l~2.2×10-5mol/l,检出限为4.7

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