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测定亚硝酸根的方法主要是以光度法为主,还有催化动力学法,但应用电极电位法报道尚少。本文采用高氯酸根电极监测KIO_4与甲基红反应受亚硝酸根的催化过程中IO_4 ~-浓度的变化,从而间接地测定与IO_4~-浓度变化成线性关系的亚硝酸根浓度。一、操作步骤向50ml比色管中分别加入2×10~(-3)mol/L甲基红溶液20ml,NH_4Ac—HAc缓冲溶液
Determination of nitrite is mainly based on the photometry method, as well as catalytic kinetic method, but the application of electrode potential method is still reported. In this paper, perchlorate was used to monitor the change of the concentration of IO_4 ~ in the reaction of KIO_4 with methyl red catalyzed by nitrite to indirectly determine the concentration of nitrite which is linear with the changes of the concentration of IO_4 ~. First, the operation steps To 50ml colorimetric tube were added 2 × 10 ~ (-3) mol / L methyl red solution 20ml, NH_4Ac-HAc buffer solution