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酚红的极谱行为已有报道.本文用极谱法和循环伏安法研究了pH1.65—12.5间酚红的电还原.实验部分与前文同. 图1为酚红在不同pH下的普通极谱曲线.实验中使用0.005%明胶抑制酚红第二还原波的第一类极大.pH1.65—10.8时,酚红产生两个还原波.pH1.65—8.8时,第一波波高无明显变化,pH>8.8时波高下降,但pH>11时波高又趋于稳定,此时波高约
The polarographic behavior of phenol red has been reported.In this paper, the polarographic and cyclic voltammetry was used to study the electroreduction of phenol red at pH1.65-12.5.The experimental part is the same as the previous one.Figure 1 shows that the phenol red at different pH Common polarographic curve.In the experiment, 0.005% gelatin is used to inhibit the second kind of phenolic red, the first type is extremely large.Ph1.65-10.8, the phenol red produces two reduction waves.pH1.65-8.8, the first wave The wave height did not change significantly, and the wave height decreased when pH> 8.8, but the wave height tended to be stable when pH> 11,