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计量人员在检定酸度计时经常遇到仪器用标准缓冲溶液校准后,测量与校准溶液的pH值相差约3pH的另一标准缓冲溶液,所得示值超过基本误差的情况。为了解决这一问题,必须从溶液、电极、电计等方面着手进行分析,找出故障原因。
Metrological staff in the test of acidity often encountered when the instrument calibration with a standard buffer solution, measuring the calibration solution with a pH difference of about 3pH another standard buffer solution, the resulting value exceeds the basic error of the situation. In order to solve this problem, we must proceed from the solution, electrode, electricity meter and other aspects of analysis to find out the cause of the malfunction.