氧化石墨烯修饰碳离子液体电极同时测定鸟嘌呤和腺嘌呤

以离子液体1-丁基-3-甲基咪唑六氟磷酸盐为粘合剂制备了碳糊电极,然后将氧化石墨烯滴涂到碳糊电极表面制成了一种新型的氧化石墨烯修饰碳离子液体电极。研究了鸟嘌呤和腺嘌呤在修饰电极上的电化学行为。实验结果表明,在0.1 mol/L醋酸盐缓冲溶液中(pH4.5),鸟嘌呤和腺嘌呤在该修饰电极上具有良好的电化学行为,在2.0×10-7～1.5×10-5mol/L浓度范围内鸟嘌呤和腺嘌呤的浓度在该电极上与电化学响应信号呈良好的线性关系,相关系数分别为为0.992和0.996。信噪比为3时,检出限为1.0×10-8mol/L。

Simultaneous determination of adenine and guanine based on graphene oxide modified carbon ionic liquid electrode

A novel electrochemical biosensor was fabricated based on graphene oxide modified carbon ionic liquid electrode(CILE).The CILE was fabricated by using the ionic liquid 1-octyl-3-methylimidazolium hexafluorophosphate as binder.The electrochemical behaviors of adenine and guanine on the modified electrode were investigated.The experimental results showed that the electrochemical respond of adenine and guanine at the modified electrode was significantly improved in acetate buffer solutions(pH 4.5).The concentration of adenine and guanine showed good linear relationships with the oxidation peak current in the range of 2.0×10-7~1.5×10-5 mol/L,with correlation coefficients of R=0.992 and 0.996,respectively.The limit of detection was 1.0×10-8 mol/L(S/N=3).