基于硫酸锰催化电位滴定法快速标定高锰酸钾标准溶液的研究

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Research on the Rapid Calibration of Potassium Permanganate Standard Solution Based on Manganese Sulfate Catalytic Potentiometric Titration

WANG Hongping （Linfen Comprehensive Inspection and Testing Center， Linfen O41ooo， China）

Abstract： This paper establishes a method for calibrating potassium permanganate standard titration solution by automatic potentiometric titration. Manganese sulfate was used as a catalyst to acelerate the reaction rate and lower the reaction temperature，and the titration mode，the volume of added liquid，the stiring speedof the rotor，and the endpoint seting of the instrument were optimized.The certified reference materials were calibrated and analyzed under the optimized determination conditions to investigate the accuracy and precision of this method.The results show that the effect is the best under the experimental conditions of equal titration mode，volume increase of 20μL， （20 stirring speed of 1200rmin-1 and setting one stop equal point at the titration endpoint. The accuracy and precision of the method are goodand it is suitable for the calibration of potassium permanganate standard titration solution.

Keywords： potassium permanganate standard titration solution; manganese sulfate; potentiometric titration method

高锰酸钾标准滴定溶液是化学实验室常用的一种滴定溶液，在水质检测、食品检测等领域有着广泛的应用。（剩余3190字）