利用苯胺和联苯胺对联吡啶钌 草酸体系电致化学发光的强猝灭作用 ,建立了电致化学发光猝灭的流动注射检测苯胺和联苯胺的方法。该方法具有良好的重现性和稳定性。在所选定的实验条件下 ,苯胺和联苯胺的检出限分别为 5 .0× 10 -7mol/L和 2 .0× 10 -7mol/L。对 1.0× 10 -5mol/L的苯胺和联苯胺 ,测定的标准偏差分别为 3%和 2 .5 % (n =6 )。对苯胺和联苯胺对联吡啶钌 草酸体系电致化学发光的猝灭机理进行了初步的探讨。Aniline and benzidine were found to quench strongly the electrochemiluminescence (ECL) of the Ru(bpy) 2+ 3 C 2O 2- 4 system when a working glassy carbon electrode was maintained at 1.50 V( vs . Ag/AgCl) in pH 6.2 phosphate buffer. A flow injection procedure with electrochemiluminescent quenching detection has been developed for determination of aniline and benzidine.The method exhibits a good reproducibility and stability with a detection limit of 5.0×10 -7 mol/L for aniline and 2.0×10 -7 mol/L for benzidine, respectively . The relative standard deviations ( n =6) were 3% and 2.5% for determination of 1.0×10 -5 mol/L aniline and benzidine, respectively. The mechanism of the inhibition effects was proposed in the preliminary way.国家自然科学基金资助项目 (No .2 0 3 75 0 3 3
