電位滴定儀的工作原(yuan)理及特(te)性  

電位滴(di)定儀(yi)工(gong)作原理

　　電(dian)(dian)(dian)位滴定(ding)(ding)儀(以下簡(jian)稱滴定(ding)(ding)儀)的工(gong)作原理，是通過測(ce)(ce)量電(dian)(dian)(dian)極(ji)(ji)電(dian)(dian)(dian)位變化，來(lai)測(ce)(ce)量離(li)子(zi)(zi)濃(nong)(nong)度(du)。首先(xian)選用適(shi)當的指示(shi)電(dian)(dian)(dian)極(ji)(ji)和參比電(dian)(dian)(dian)極(ji)(ji)，與(yu)被(bei)測(ce)(ce)溶液組成一個工(gong)作電(dian)(dian)(dian)池，然后加入滴定(ding)(ding)劑。在滴定(ding)(ding)過程(cheng)中，由于發(fa)生化學反應，被(bei)測(ce)(ce)離(li)子(zi)(zi)的濃(nong)(nong)度(du)不斷發(fa)生變化，因(yin)而指示(shi)電(dian)(dian)(dian)極(ji)(ji)的電(dian)(dian)(dian)位隨之(zhi)變化。在滴定(ding)(ding)終點附近(jin)，被(bei)測(ce)(ce)離(li)子(zi)(zi)的濃(nong)(nong)度(du)發(fa)生突變，引起電(dian)(dian)(dian)極(ji)(ji)電(dian)(dian)(dian)位的突躍，因(yin)此(ci)根(gen)據電(dian)(dian)(dian)極(ji)(ji)電(dian)(dian)(dian)位的突躍可確定(ding)(ding)滴定(ding)(ding)終點，并給(gei)出測(ce)(ce)定(ding)(ding)結(jie)果(guo)。

電位滴(di)(di)(di)(di)(di)(di)定(ding)(ding)(ding)儀是化(hua)學實驗(yan)室的一(yi)種容量分(fen)析(xi)儀器(qi)，它適用(yong)于環保化(hua)工(gong)、冶金、制藥(yao)等(deng)各行(xing)各業，用(yong)于酸堿滴(di)(di)(di)(di)(di)(di)定(ding)(ding)(ding)、氧化(hua)還原滴(di)(di)(di)(di)(di)(di)定(ding)(ding)(ding)、非水滴(di)(di)(di)(di)(di)(di)定(ding)(ding)(ding)各類電位滴(di)(di)(di)(di)(di)(di)定(ding)(ding)(ding)的成分(fen)分(fen)析(xi)。具有自(zi)動滴(di)(di)(di)(di)(di)(di)定(ding)(ding)(ding)功能(neng)，容量滴(di)(di)(di)(di)(di)(di)定(ding)(ding)(ding)值有 LED 直(zhi)接數字顯示(shi)，手滴(di)(di)(di)(di)(di)(di)或預設終點自(zi)動滴(di)(di)(di)(di)(di)(di)定(ding)(ding)(ding)方(fang)便直(zhi)觀。

儀器(qi)特點

1、 具(ju)有(you)自(zi)動(dong)吸液(ye)、自(zi)動(dong)注液(ye)、自(zi)動(dong)測定功能

2、 制的精(jing)密計量泵確保(bao)滴定結果的準確性

3、 三通轉換(huan)閥及液路部分選用特(te)殊材料制成(cheng)，耐(nai)腐蝕性(xing)好，可(ke)維護長期(qi)連續工作

4、系(xi)統(tong)密封良(liang)好確保液路中不產生氣泡