十二烷基苯磺酸钠-盐酸苯海索-Ru(bpy)2+3体系的电化学发光行为研究及应用

在十二烷基苯磺酸钠(SDBS)存在下,考察了盐酸苯海索(BH)-Ru(bpy)32+体系的电化学及其发光行为。结果表明,BH对Ru(bpy)32+体系的电化学发光具有增敏效应;在SDBS存在下,BH对Ru(bpy)32+体系电化学发光的增敏效应显著增强,发光强度提高约16倍。据此建立了一种高效、简便的BH电化学发光新方法。在最佳实验条件下,BH的浓度在4.0×10-7～1.0×10-4 mol/L范围内与相对发光强度呈线性关系(r=0.995 5),检出限(S/N=3)为1.11×10-9 mol/L;连续平行测定1.0×10-5 mol/L BH溶液10次,发光强度的RSD为3.2%。样品的回收率为96%～108%,RSD为4.3%。该方法样品前处理简单,具有较高的选择性和灵敏度,用于实际样品中BH的测定,结果满意。

Determination of Benzhexol Hydrochloride by Electrochemiluminescence in the Presence of Sodium Dodecyl Benzene Sulfonate

In the presence of sodium dodecyl benzene sulfonate(SDBS),the electrochemical and electrochemiluminescence(ECL) characteristics of the Ru(bpy)2+3- benzhexol hydrochloride(BH) system at Au electrode were studied by ECL and cyclic voltammetric(CV) method.The results showed that the ECL intensity of Ru(bpy)2+3 at Au electrode was enhanced significantly in the presence of BH.In the presence of SDBS,the ECL intensity of Ru(bpy)2+3- benzhexol hydrochloride system was enhanced about 16 times.Based on this,a new electrochemiluminescence method was established for the determination of BH.Under the optimum condition,the enhanced ECL intensity had a good linear relationship with the concentration of BH in the range of 4.0×10-7-1.0×10-4 mol/L,with a detection limit of 1.11×10-9 mol/L.The RSD(n=10) of ECL intensities for the determinations of 1.0×10-5 mol/L BH were 3.2%.The recoveries for the samples were between 96% and 108% with RSD of 4.3%.With high selectivity and sensitivity,this proposed method was applied in the determination of BH in real sample with satisfactory results.