1、配制電(dian)(dian)解液(ye):先稱(cheng)取6克(ke)碘(dian)化鉀(jia),6克(ke)溴化鉀(jia),待其溶于250毫(hao)升蒸(zheng)餾水中(zhong)后,再加入10毫(hao)升冰乙酸,攪拌均(jun)勻即可。電(dian)(dian)解液(ye)可重復使用(yong),用(yong)的時(shi)間長短根(gen)據重復使用(yong)次數(shu)和試樣含硫量高低(di)而(er)定,但每次做實驗前(qian)應進行1-2次測定,使電(dian)(dian)解液(ye)中(zhong)碘(dian)-碘(dian)離子(zi)對(dui)的電(dian)(dian)極(ji)電(dian)(dian)位校正(zheng)到儀(yi)器(qi)的所需數(shu)值(zhi)(zhi),電(dian)(dian)解液(ye)的PH值(zhi)(zhi)在1-3時(shi),可以(yi)使用(yong),但PH值(zhi)(zhi)小(xiao)于1時(shi),應予(yu)以(yi)廢棄。鶴壁市新銳科技(ji)有限(xian)公(gong)司專業生產、銷售煤(mei)炭化驗儀(yi)器(qi),煤(mei)質分(fen)析儀(yi)器(qi),煤(mei)焦化驗儀(yi)器(qi)
2、煤樣(yang)(yang)(yang)(yang)的(de)(de)制備:在試(shi)樣(yang)(yang)(yang)(yang)稱量前,應盡(jin)可能地將試(shi)樣(yang)(yang)(yang)(yang)瓶內(nei)的(de)(de)試(shi)樣(yang)(yang)(yang)(yang)混(hun)(hun)合均勻,盡(jin)量用手握(wo)住帶蓋的(de)(de)試(shi)樣(yang)(yang)(yang)(yang)瓶上(shang)方(fang),手腕自上(shang)而下的(de)(de)圓周運動,或打開瓶蓋用稱樣(yang)(yang)(yang)(yang)勺攪拌試(shi)樣(yang)(yang)(yang)(yang),試(shi)樣(yang)(yang)(yang)(yang)充分混(hun)(hun)合是保證結果準確的(de)(de)關鍵,在瓷(ci)舟上(shang)稱取50±2毫克的(de)(de)煤樣(yang)(yang)(yang)(yang),稱準到(dao)0.1毫克,上(shang)面薄薄地覆蓋一層WO3或W2O3,注意應(ying)直接在瓷舟(zhou)(zhou)上稱(cheng)(cheng)(cheng)(cheng)量,不能用(yong)別(bie)的器具稱(cheng)(cheng)(cheng)(cheng)量再倒入瓷舟(zhou)(zhou)中,以保(bao)證稱(cheng)(cheng)(cheng)(cheng)量精度,保(bao)證稱(cheng)(cheng)(cheng)(cheng)量的準確性(xing)是保(bao)證結果準確的前提。
上一條:量熱儀的使用
下一條:沒有啦! |
返(fan)回列(lie)表(biao) |