簡要描述：pH電(dian)(dian)極測(ce)量的(de)(de)(de)核(he)心理論(lun)是(shi)能(neng)斯特方(fang)程(cheng)。電(dian)(dian)位分析法(fa)所用的(de)(de)(de)傳(chuan)感器被(bei)稱(cheng)為(wei)(wei)原電(dian)(dian)池。原電(dian)(dian)池是(shi)一(yi)個(ge)(ge)系統,它(ta)的(de)(de)(de)作(zuo)(zuo)用是(shi)使化學反應能(neng)量轉(zhuan)成(cheng)為(wei)(wei)電(dian)(dian)能(neng)。此電(dian)(dian)池的(de)(de)(de)電(dian)(dian)壓被(bei)稱(cheng)為(wei)(wei)電(dian)(dian)動勢(EMF)。此電(dian)(dian)動勢(EMF)由(you)二個(ge)(ge)半(ban)電(dian)(dian)池構成(cheng)。其中一(yi)個(ge)(ge)半(ban)電(dian)(dian)池稱(cheng)作(zuo)(zuo)測(ce)量傳(chuan)感器,它(ta)的(de)(de)(de)電(dian)(dian)位與特定的(de)(de)(de)離子活度有關;另(ling)一(yi)個(ge)(ge)半(ban)電(dian)(dian)池為(wei)(wei)參比半(ban)電(dian)(dian)池,通常稱(cheng)作(zuo)(zuo)參比傳(chuan)感器,它(ta)一(yi)般是(shi)與測(ce)量溶液相通,并且(qie)與測(ce)量儀表相連。