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容量法卡尔费休水分测定中铂电极的影响

内容摘要:总有实验猿们反应,水分仪最近一直不太好用,或说某厂家的卡尔费休试剂不好用。就拿每日标定卡尔费休滴定液来说,标定三次滴定液浓度的相对平均偏差要求小于2.0%,很难标定,其实有很多时候就是铂电极脏了,导致预滴定难以结束。大家可能在标定的时候可能很少去关注滴定杯中的颜色,因为都是仪器自动滴定,这就让我们忽略一个问题,就是在预滴定时是否过滴定,我们怎么可以判断为过滴定呢,这时候我们需要自己观察一下滴定杯中的溶剂颜色,正常情况下,当滴定杯中没有水分时,滴定杯中应该为淡黄色或略深(醛酮试剂的颜色会更深),如

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容量法卡尔费休水分测定中铂电极的影响


RUGUOWOMENDEBODIANJIZANGLE(ROUYANBUYIDINGKEYIKANDAO),JIUKENENGDAOZHIWOMENDIDINGYEJIARUGUODUO,JIUHUICHENGXIANYIZHONGZONGHUANGSE,HUOZHEGENGWEISHENZHEZONGHESE,QIANZHEHUOXUWOMENDEYUDIDINGKENENGJIESHU,DANHOUZHEDEZONGHESE,KENENGHENZANGHENZANGLE,WOMENDEYUDIDINGJIUNANYIJIESHULE,ZHEISHIHOUJIUCHUXIANLEGUODIDING。


DAJIAZIXIGUANCHASHANGTU,YIDINGYAODIAOJIEHESHIDEJIAOBANSUDU,DAIZHUANGHONGHESEDIANRUOMEIYOUJISHIDEDAOJIAOBANHUNYUN, NONGDIANYECHUJIDAODIANJISHANG,HUICHUXIANJIEZHONGDIANXIANXIANG。YEJIUSHISHUOZHONGDIANTIQIAN。


粘稠易污染的油性样品等,我们用的甲醇不一定很好的去溶解这个样品,样品就粘在我们的铂电极上


1. XUANZEHESHIDEQIANGRONGJIRONGJIE。

2.KEYIYONGSHAOLIANGDEBINGTONG(BINGTONGDUXINGJIAODA)CASHIBODIANJI,ZHIHOUYONGCHUNHUASHUICHONGXI,CAGANJIHAO

3.RUGUOHAISHIBUXING,KEYISHIYONGGESUANXIYEJINPAOQINGXI

GESUANXIYE(JIZHONGGESUANJIA-LIUSUANXIYE),YOUQIANGYANGHUAXING,DUIBOLIQIMINFUSHIXINGXIAOJIXIAO,YOUQIANGSUANXING(10gZHONGGESUANJIA+20mlSHUI+180mlDENONGLIUSUAN),ZHONGQIANGSUANXING(10gZHONGGESUANJIA+100mlSHUI+100mlNONGLIUSUAN)HERUOSUANXING(10g+100mlSHUI+10mlNONGLIUSUAN)。

4、QIANGXIAOSUANJINPAO。

DIANJILAOHUA、DUNHUADEHUA,GAIGENGHUANJIUYAOGENGHUANLE。


DIDINGBEIKEYIYONGCHANGGUIXIDIJI,JIANXINGXIYERUTANSUANNARONGYE,TANSUANQINGNARONGYE,HUOZHELINSUANSANNARONGYE,HUOZHELINSUANQINGERNARONGYEJINPAOQINGXI


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