钒-2-(3,5-二溴-2-吡啶偶氮)-5-二乙氨基酚-二苯胍-NaBrO_3体系极谱催化波的研究  

Study on the Polarographic Catalytic Wave of Vanadium-2-(3,5-Dibrorno-2-Pyridylazo)-5-Diethylaminophenol-Diphenylquanidine-Sodiurn Brornate system

作　　者：张成孝[1] 杨俊华[1] 

机构地区：[1]陕西师范大学化学系,西安710062

出　　处：《分析化学》1990年第6期563-566,共4页Chinese Journal of Analytical Chemistry

摘　　要：本文报道了钒-3,5-Br_2-PADAP-DPG-NaBrO_3新极谱催化波体系,确定了测定钒的适宜底液条件,测定钒的线性范围为0.04～18ng/ml,探讨了极谱波性质,本法成功地应用于自来水和矿样中钒的测定。In a supporting electrolyte containing 6. 0×10^(-6)mol/L 3, 5-Br_2-PADAP, 0.002% DPG, 0.030 mol/L NaBr0_3, CICH_2COOH-CICH_2COONa (pH=3. 00±0. 20), a sensitive polarographic catalytic wave of vanadium has been obtained by single-sweep polarography. The rela-tionship between peak height and the concentration of vanadium is linear in the range of 0. 04～18ng/ml. The wave has been proved to be a polarographic catalytic wave with adsorptive behavior by several electrochemical methods The method has been applied to the determination of trace vanadium in tap water and ores with satisfactory results.

关 键 词：钒 Br2-PADAP 溴酸钠 极谱法 水 

分 类 号：O661.1[理学—分析化学]