香草醛的极谱行为研究

香草醛的极谱行为研究 STUDIED ON POLAROGRAPHIC BEHAVIOR OF VANILLIN 韦进宝 Wei Jinbao 1 first-author 唐智勇 Tang Zhiyong 1 张良轶 Zhang Liangyi 1 肖玫 Xiao Mei 1 张琳 Zhang Lin 1 武汉大学环境科学系 武汉大学环境科学系 Department of Environmental Science,Wuhan University Department of Environmental Science,Wuhan University 研究了香草醛的极谱吸附波．香草醛与硫酸联氨在酸性介质中发生反应，其产物在示波极谱仪上可观察到一个灵敏的二阶导数吸附还原波．峰电位为－１．０９Ｖ（ｖｓ．ＳＣＥ）．浓度在２．００×１０－５～１．００×１０－７ｍｏｌ·Ｌ－１范围内，导数峰高呈良好的线性关系．检测下限为５．００×１０－８ｍｏｌ·Ｌ－１．本方法可用于测定水中的香草醛．还探讨了香草醛的极谱行为和电极反应机理． This paper studied on adsorptive wave of vanillin.Vanillin can react with hydrazine sulfate in the acid medium.Reaction products can reduce at mercury electrode with a sensitive adsorptive wave （ E p= -1.09 V vs.SCE）.A lineear relationship holds between the peak heights and the concentration of vanillin in the range of 2.00×10 -5 ～1 00×10 -7 mol·L -1 .The detection limit is 5.00×10 -8 mol·L -1 .The method can be used for the determination of vanillin in water.The behavior of polarograhic wave was studied and the mechanism of electrode reaction was explored. 香草醛 极谱分析 吸附波 vanillin polarographic analysis adsorptive wave O625.4;O657.14 1998-02-01 2021-04-01 2