實(shi)驗(yan)室全(quan)自動定硫儀的日常維護(hu)怎么做(zuo)？

實驗室里的全(quan)自動定硫儀知道怎么(me)(me)使用(yong)(yong)，但是平時怎么(me)(me)去(qu)維(wei)護(hu)它呢(ni)？讓它的使用(yong)(yong)長(chang)一些。

1、玻璃熔板(ban)及其(qi)管道有黑(hei)(hei)色沉積(ji)物時應及時進行清洗。

清洗(xi)(xi)方法如下：取出電(dian)(dian)解(jie)池(chi)(chi)(chi)(不必將(jiang)(jiang)(jiang)蓋打開)，在(zai)電(dian)(dian)解(jie)池(chi)(chi)(chi)中(zhong)先(xian)放入(ru)一些水(shui)，以不漫到熔(rong)(rong)板(ban)(ban)(ban)為(wei)宜。將(jiang)(jiang)(jiang)電(dian)(dian)解(jie)池(chi)(chi)(chi)傾斜放置，用(yong)滴管(guan)(guan)往(wang)熔(rong)(rong)板(ban)(ban)(ban)的(de)支管(guan)(guan)中(zhong)注入(ru)新配制(zhi)的(de)洗(xi)(xi)液(ye)(5克重鉻酸鉀和(he)10毫(hao)升水(shui)，加(jia)熱溶解(jie)冷卻后(hou)緩緩加(jia)入(ru)100毫(hao)升濃硫(liu)酸)，待(dai)洗(xi)(xi)液(ye)流凈后(hou)再反復加(jia)入(ru)2—3次，即可(ke)去除(chu)熔(rong)(rong)板(ban)(ban)(ban)及支管(guan)(guan)中(zhong)的(de)黑色沉(chen)積物。然后(hou)用(yong)自來水(shui)沖洗(xi)(xi)電(dian)(dian)解(jie)池(chi)(chi)(chi)，并用(yong)洗(xi)(xi)耳(er)球從熔(rong)(rong)板(ban)(ban)(ban)支管(guan)(guan)中(zhong)抽水(shui)洗(xi)(xi)至不殘留(liu)洗(xi)(xi)液(ye)，熔(rong)(rong)板(ban)(ban)(ban)應潔白如初。用(yong)濾紙條(tiao)吸(xi)干熔(rong)(rong)板(ban)(ban)(ban)及其(qi)支管(guan)(guan)中(zhong)的(de)水(shui)，將(jiang)(jiang)(jiang)電(dian)(dian)解(jie)池(chi)(chi)(chi)裝(zhuang)好，打開電(dian)(dian)磁(ci)泵，用(yong)空氣吹干玻璃(li)熔(rong)(rong)板(ban)(ban)(ban)及其(qi)支管(guan)(guan)，然后(hou)加(jia)入(ru)電(dian)(dian)解(jie)液(ye)使用(yong)，燃燒管(guan)(guan)與電(dian)(dian)解(jie)池(chi)(chi)(chi)間(jian)的(de)玻璃(li)閥門(men)，有黑色沉(chen)積物時(shi)，用(yong)濾紙條(tiao)擦凈即可(ke)。

2、如(ru)燒(shao)結玻璃熔板清(qing)洗(xi)后，流(liu)(liu)量(liang)計指示(shi)的(de)流(liu)(liu)速仍達不(bu)到1000毫(hao)升(sheng)/分，或(huo)雖可達1000毫(hao)升(sheng)/分，但熔板處(chu)沒有氣泡或(huo)氣泡很少(shao)，需檢查電磁泵(beng)到電解池的(de)各部分是否漏氣，其中包括連接的(de)乳膠(jiao)管(guan)、硅(gui)橡(xiang)(xiang)膠(jiao)管(guan)、氣體凈(jing)化管(guan)的(de)橡(xiang)(xiang)膠(jiao)塞及電解池等處(chu)。

3、不(bu)要用手觸摸指示電(dian)(dian)極(ji)與電(dian)(dian)解電(dian)(dian)極(ji)，否則將會(hui)沾污電(dian)(dian)極(ji)。

放電(dian)(dian)(dian)解液(ye)時，如忘(wang)記將(jiang)控制(zhi)器(qi)面板上的電(dian)(dian)(dian)解調節開關(guan)撥到“關(guan)”，則會在電(dian)(dian)(dian)極(ji)和指示電(dian)(dian)(dian)極(ji)上蒙上一(yi)層薄(bo)薄(bo)的碘，產生(sheng)電(dian)(dian)(dian)極(ji)沾污(wu)。指示電(dian)(dian)(dian)極(ji)一(yi)旦沾污(wu)，終點控制(zhi)即(ji)失靈，常導致過滴定。此時，應用乙醇擦洗電(dian)(dian)(dian)極(ji)。

4、在加放電解液(ye)洗電解池(chi)時，不要(yao)把溶(rong)液(ye)撒到電解池(chi)上(shang)的插座上(shang)，否則會導致終(zhong)點控制失靈。失靈后用乙醇(chun)擦洗插頭。

5、每(mei)隔3—5天(tian)用標樣校(xiao)驗(yan)一次，以檢查燃(ran)燒管是(shi)否破裂(lie)或(huo)其(qi)它部分是(shi)否有漏氣現象。

實驗室里的(de)分析儀器使用(yong)(yong)(yong)的(de)時候(hou)好好用(yong)(yong)(yong)，不用(yong)(yong)(yong)的(de)時候(hou)好好維護，讓(rang)定硫儀的(de)使用(yong)(yong)(yong)實間(jian)長一些。