摘要
研究了丹皮酚(PN)在3-氨基丙基三氧基硅烷(APTS)与离子液体([BnMIM] PF6)复合修饰碳糊电极(APTS-[BnMIM] PF6/CPE)上的电化学行为和电化学动力学性质,并用循环伏安法(CV)及计时电流法(CA)测得PN在APTS-[BnMIM] PF6/CPE上的电极反应动力学参数.实验结果表明,PN在APTS-[BnMIM] PF6/CPE上发生了受扩散控制的不可逆电化学氧化过程.用方波伏安法(Swv)测得PN氧化峰电流与其浓度在9.0×10^-7~2.0×10^-4 mol· L^-1和3.0×10^-4~1.5×10^-3 mol·L-1范围内呈良好线性关系,检出限(LOD,S/N=3)和定量下限(LOQ,S/N=10)分别为3.5×10^-8 mol·L^-1和1.2×10^-7 mol·L^-1.同时运用该方法对丹皮酚注射液中PN含量进行了电化学定量测定,其RSD为0.58%~2.4%,加标回收率为96.0%~102.0%.
The electrochemical behaviors and electrochemical kinetic of paeonol(PN) at 3-aminopropyltriethoxysilane and [BnMIM] PF6 modified carbon paste electrode (APTS-[BnMIM] PF6/CPE) were investigated.The electrochemical kinetic parameters of PN at APTS-[BnMIM] PF6/CPE were determined by cyclic voltammetry(CV) and chronoamperometry(CA).The experimental results indicated that PN electrochemical behavior exhibits an irreversible electrochemical oxidation process at APTS-[BnMIM] PF6/CPE.The oxidation peak current of PN versus its concentration had a good linear relationship in the concentration ranges of 9.0 × 10-7-2.0 × 10-4 mol · L-1,3.0 × 10-4-1.5 × 10-3 mol · L-1 with a detection limit(LOD,S/N =3) of 3.5 × 10-8 mol · L-1 and a limit of quantitation(LOQ,S/N =10) of 1.2 × 10-7 mol · L-1.The proposed method was successfully applied in the determination of PN contents in injection samples with their relative standard deviations of 0.58%-2.4% and recoveries of 96.0%-102.0%.
出处
《分析测试学报》
CAS
CSCD
北大核心
2014年第2期150-155,共6页
Journal of Instrumental Analysis
基金
国家自然科学基金资助项目(21265014)
宁夏自然科学基金资助项目(NZ1147)