摘要
制备了石墨烯和疏水性离子液体1-丁基-3-甲基咪唑六氟磷酸盐(BMIMPF6)复合修饰电极(Gene-BMIMPF6/GCE),运用循环伏安法研究了对乙酰氨基酚(PT)在该复合修饰电极上的电化学行为。结果表明,在pH=6.5的磷酸盐缓冲溶液中,PT在复合修饰电极上出现一对明显的氧化还原峰,在20～260mV/s的扫描速率范围内,其氧化还原峰电流均与扫描速率平方根(v1/2)呈线性关系,表明该电极过程是受扩散控制的。优化了方波溶出伏安法(SWSV)的实验参数,PT浓度在6.0×10-7～8.0×10-5mol/L范围内与峰电流Ipa呈线性关系,检出限(S/N=3)为1.0×10-7 mol/L。采用该法对PT进行加入回收测定,回收率为96.9%～101.2%。
The electrochemical behavior of Paracetamol （PT） at a graphene and 1-n-butyl-3- methylimidazolium hexafluorophosphate ionic liquids modified electrode （Gene-BMIMPF6/GCE） was investigated by cyclic voltammety（CV）. There was a pair of redox peaks of PT on the Gene-BMIMPF6/ GCE in pH = 6.5 PBS buffer solution. The peak current was linear to the square root of the scanning rate in the range of 20 - 260 mV/s, and the result indicated that the process was controlled by diffusion. Experimental parameters were optimized and the correlation between peak current （Ⅰpa） and concentration was studied by square wave stripping voltammetry（SWSV）. Under the optimal conditions, there was an excellent linearity between the peak current and concentration of PT in the range of 6.0×10^-7-8. 0×10^-5mol/L with the detection limit of 1.0× 10^- 7mol/L（S/N=3）. The developed method was 101. app 2%.ied for the determination of PT in simulated sample,and the recovery was between 96.90.% and 101.2%.
出处
《分析科学学报》
CAS
CSCD
北大核心
2012年第5期677-680,共4页
Journal of Analytical Science
基金
四川省高校科技创新团队建设项目(No.2010008)
