摘要
采用固相合成法制备了纳米二氧化铈并对其进行了表征。研究了环境激素双酚A在CeO2修饰碳糊电极上的电化学行为。在0.01 mol/L(pH 9.18)的硼砂溶液中,BPA于0.40 V处产生一不可逆的氧化峰,与裸碳糊电极相比,BPA在修饰电极上的电流响应明显增大,据此建立了测定塑料样品中BPA的线性扫描伏安法。线性范围为5.0×10-8～3.0×10-5mol/L(r=0.9992,n=5),检出限为2.0×10-8mol/L,加标回收率为93.9%～107.5%。
CeO2 nanoparticles were prepared by solid-state reaction spectra. The electrochemical behavior of bisphenol A on a CeO2 mo with cyclic vohammetric and linear sweep vohammetric methods. Re borate solution of pH 9. 1g, an irreversible oxidation and characterized by UV-Vis and XRD dified carbon paste electrode was studied suits showed that, in 0. 01 mol/L sodium peak of BPA was observed at ＋ 0.40V （ vs. SCE） Comparing with that at a bare electrode, the current of BPA was greatly increased at the modified electrode. Based on this, a linear sweep vohammetric method for the determination of BPA was established. The experimental conditions, including the amount of electrolyte, accumulation potential and time, were curve was linear in the concentration range of 5.0 × 0. 9992 and a detection limit of 2.0 × 10 8mol/L. CeO2, the type and concentration range of supporting optimized. Under the optimal conditions, the calibration 10 -8 - 3.0 × 10^-5mol/L with a correlation coefficient of The RSD （n=10） for the determination of 2.0 ×10^-6 mol/L BPA was 4.7% and the recoveries were 93.9% - 107.5%.
出处
《分析试验室》
CAS
CSCD
北大核心
2011年第2期1-5,共5页
Chinese Journal of Analysis Laboratory
基金
陕西省自然科学基金项目(2010JQ2005)
延安大学专项科研基金项目(YD-2007-7)资助
关键词
双酚A
纳米二氧化铈
碳糊电极
电化学测定
Disphenol A
CeO2nanoparticles
Carbon paste electrode
Electrochemical determination
