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甘汞电极在定温下具有稳定的电极电势,是化学实验中使用较为广泛的一种参比电极.但若使用和维护不当,其电极电势值就会发生变化而使相关实验产生较大的误差,因此,实验室每年都有相当数量的甘汞电极报废,造成一定的浪费.为了解决这一问题,我们查阅了有关资料并根据甘汞电极的制作原理,对即将报废的饱和甘汞电极进行了修复,结果令人满意.我们的方法是:第一,将废旧甘汞电极中的饱和KCl溶液全部倒出,用大量的自来水冲洗,再用去离子水认真清洗直至用AgNO_3溶液检不出Cl~-,再用去离子水将其浸泡24小时.第二,用饱和KCl溶液将上述电极浸泡36小时.第三,将优级纯(A.R)的KCl晶
Calomel electrode has a stable electrode potential at constant temperature and is a kind of reference electrode widely used in chemical experiments.But if using and maintaining improperly, its electrode potential value will change and make the relevant experiment have a big error , So every year lab has a considerable amount of calomel electrode scrapped, resulting in some waste.In order to solve this problem, we reviewed the relevant information and based on the calomel electrode fabrication principle, the upcoming retirement of saturated calomel electrode The results are satisfactory.Our method is: First, the spent calomel electrode in the saturated KCl solution all poured out, rinse with plenty of tap water, then carefully cleaned with deionized water until the solution can not be detected with AgNO_3 Cl ~ -, and then soaked in deionized water for 24 hours.Second, soaked with saturated KCl solution electrode for 36 hours.Third, the grade of pure (AR) KCl crystal