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该电极端部为惰性贵金属<\/span>-----<\/span>铂金制成。它是氧化还原电位测定、电位滴定和极谱法测定中不可缺少的指示电极，也是化学修饰电极重要原电极，在水质监测、环境生态、土壤底泥、金属腐蚀研究和化学化工中有广泛的应用。<\/span><\/span><\/strong> <\/p> <\/span><\/span>使用及维护<\/span><\/strong> <\/p> 1<\/span>、用前以水浸泡并清洗电极表面。测定时可用各种<\/span>pH/mV<\/span>计连用，与甘**电极或银氯化银配对，将电极直接插入样品，电位稳定时读数。<\/span><\/span><\/strong> <\/p> 2<\/span>、原位测定土壤、底泥等尤需仔细，勿使端部变形、表面毛糙，暂时不用时可浸泡入水中，长久不用册干放于盒内。<\/span><\/span><\/strong> <\/p> 3<\/span>、电极用久后，表面氧化膜或吸附物，应用<\/span>0.2MHc1v1<\/span>—<\/span>0.1MNac1<\/span>—<\/span>0.2%Na2<\/sub>SO3<\/sub><\/span>混合液加热至<\/span>70<\/span>℃<\/span>处理<\/span>2<\/span>小时，然后在醌氢醌饱和的<\/span>0.05m<\/span>邻苯二甲酸氢钾溶液中检测电位<\/span>E<\/span>，应符合下式：<\/span><\/span><\/strong> <\/p> E=455<\/span>—<\/span>0<\/span>。<\/span>09<\/span>（<\/span>t<\/span>—<\/span>25<\/span>）—<\/span>[59.1+0.2(t<\/span>—<\/span>25)pH<\/span><\/span><\/strong> <\/p> 其中：<\/span>pH<\/span>为<\/span>0.05<\/span>邻苯二甲酸氢钾溶液在<\/span>T<\/span>℃时的<\/span>pH<\/span>值。<\/span><\/span><\/strong> <\/p><\/div>
