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水分测定仪测量结果的影响因素

作者:admin-1 来源:未知 时间:2021-04-14 点击:次

[文章前言]:  卡氏滴定是通过电极传输的信号判定反应终点,因此,电极的灵敏度直接影响滴定结果。很多因素可导致电极灵敏度下降,如杂质附着于电极表面,可使电极灵敏度降低,导致测定

  1.电极的影响

  KASHIDIDINGSHITONGGUODIANJICHUANSHUDEXINHAOPANDINGFANYINGZHONGDIAN,YINCI,DIANJIDELINGMINDUZHIJIEYINGXIANGDIDINGJIEGUO。HENDUOYINSUKEDAOZHIDIANJILINGMINDUXIAJIANG,RUZAZHIFUZHEYUDIANJIBIAOMIAN,KESHIDIANJILINGMINDUJIANGDI,DAOZHICEDINGJIEGUOPIANGAO;DIANJISHIYONGSHIJIANGUOZHANG,YEHUIDAOZHIDIANJILINGMINDUJIANGDI。YINCI,DIANJIZAISHIYONGQIANYINGJISHIJIANCHAWEIHU。

  2.电解液的影响

  ZHENGCHANGDECEDINGGUOCHENG,MEI100mLDIANJIEYEKEYUBUXIAOYU1gDESHUIJINXINGFANYING。ZAISHIJICEDINGZHONG,RUOCEDINGSHIJIANGUOZHANG,KONGQIZHONGDESHUIFENHUIDUIKASHISHIJICHANSHENGYINGXIANG,JIAYIRONGYEHUNHEHOUWENDINGXINGHUIXUNSUJIANGDI,ZHEIXIEYINSUDOUHUICUSHIDIANJIEYEMINGANXINGJIANGDI;DIANJIEGUOCHENGZHONGRUFAXIANYINJISHIZHONGDIANJIEYESHIFANGQIANGLIEQIPAOHUOQIYIBEIWURANCHENGDANHONGHESE,DIDINGZHONGDIANSHIJIANHUIJIAZHANG。CHUXIANZHEIXIEXIANXIANGDOUYINGJINKUAIGENGHUANDIANJIEYE。

  3.进样要求与进样量的影响

  DANGJIANGYANGPINZHURUDIANJIEYESHI,YINGZHUYIZHENTOUXUCHARUYEMIANXIA,BINGBIMIANYUDIANJIECHIBIHUODIANJIJIECHU,YIFANGYANGPINSUNSHI。DANPUTONGJINYANGZHENYOUYUQIZHENJIANJIAODUANJIAOCU,WUFADADAOSHANGSHUYAOQIU。XUANZEJINYANGZHENSHI,YINGJINLIANGXUANZEZHENJIANZHANGDUZAI15cmZUOYOUDEJINYANGZHEN,CIJINYANGZHENKEYOUXIAOBIMIANSHANGSHUXIANXIANGFASHENG。WEIDEDAOZHUNQUEDECEDINGJIEGUO,JINYANGLIANGYINGYUQIHANSHUILIANGYIZHI。DANRUGUOJINYANGSUDUJIAOMAN,YANGPINHUIHUIFAHUOXISHOUKONGQIZHONGDESHUIFEN,CONGERDUICEDINGJIEGUOZAOCHENGYINGXIANG。WEIZAIDUANSHIJIANNEICHENGDEYANGPINZHILIANGBINGJINYANG,KEZAISHUIFENCEDINGYIPANGPEIZHIYITAIJIAOXIAOFENDUWEI0.01mgDEDIANZITIANPING,JINYANGZHENQUYANGHOUKELIKECHENGDEQIZHILIANGBINGJINYANG,CONGERJIANGDICHANSHENGWUCHADEKENENGXING。

  4.副反应的影响

  KASHISHIJIDERONGYEYIZHONGHANYOUDIAN,ERLIUCHUNHELIUHUAQINGYUSHUIYIYANGKEYIXIAOHAODIAN,DAOZHISHUIFENCEDINGJIEGUOPIANGAO,YINCIHANYOULIUCHUNHUOLIUHUAQINGDENGDEYANGPIN,BUSHIYONGKASHIFADIDING。TONGYANGBUSHIYONGKASHIFADIDINGDEHAIYOUQUANTONGLEIYANGPIN。CHANGYONGDEKASHISHIJIYIBANYIJIACHUNZUORONGJI,QUANTONGLEIHUAHEWUHUIHEJIACHUNFANYINGSHENGCHENGSUOQUANHUOSUOTONGJISHUI,YINCI,YINGXUANYONGQITABUHANJIACHUNQIESHIYONGYUQUANTONGDESHIJILAICEDING。

  5.仪器条件的影响

  (1)搅拌速度:滴定时搅拌应充分并均匀,适当调节搅拌速度以保证电解液混合充分,且搅拌子不能跳动,以防碰到电极。

  (2)碘的生成速度:碘的生成速度与样品中水分含量有关。水分含量越低,设定的碘生成速度越慢,这样可以保证样品中的水分完全被电解。

  (3)电解结束参数:一般由设定的较长时间或漂移结束点来控制电解过程是否结束。

  6.漂移值的影响

  YINGXIANGYIQIPIAOYIDEYINSUHENDUO,ZHUYAOBAOKUO:YIQIMIFENGXINGBUHAOHUOCEDINGHUANJINGSHIDUJIAODA,KONGQIZHONGDESHUIFENHUIMANMANSHENRUFANYINGXITONG;ZAICEDINGGUOCHENGZHONGFASHENGFUFANYING,RUSUOTONGHUOZHIHUAFANYINGDENG,DOUHUISHENGCHENGSHUI;SHIYONGCHAOGUOSHIXIAODEKASHISHIJIDENG,ZHEIXIEYINSUDOUKEZAOCHENGPIAOYIZHIDEBIANHUA。FAXIANYISHANGQINGKUANG,YINGJISHIJIEJUE,YIBAOZHENGCEDINGJIEGUOZHUNQUEKEKAO。

  结束语

  WEILEQUEBAOWEILIANGSHUIFENCEDINGYICEDINGDEZHUNQUEXING,ZAICEDINGQIAN,YINGDUIDIANJIJINXINGQINGXI、JISHIGENGHUANDIANJIEYE;CEDINGSHI,XUANZEZHENJIANZHANGDUZAI15cmZUOYOUDEJINYANGZHENJINYANG,BINGZAISHUIFENCEDINGYIPANGPEIBEIDIANZITIANPING,FANGBIANJISHICHENGLIANG;GENJUYANGPINXINGZHIXUANZEDIANJIEYE;DIAOJIEJIAOBANZIZHUANSU,KONGZHIDIANSHENGCHENGSUDU,ZHUNQUEPANDINGDIDINGZHONGDIAN;QUANMIANLEJIEKENENGZAOCHENGYIQIPIAOYIDEYINSU,BINGJISHIPAICHU。ZAICEDINGGUOCHENGZHONG,ZHIYAOZIXIGUANCHA,CHONGFENFENXI,BUDUANMOSUO,KONGZHIBINGPAICHUYINGXIANGCEDINGDEGEXIANGBULIYINSU,JIUKEHUODEZHUNQUEDECEDINGJIEGUO。

  以上就是小编为大家介绍的 水分测定仪测量结果的影响因素的全部内容,如果大家还对相关的内容感兴趣,请持续关注青岛拓科仪器有限公司

  本文标题: 水分测定仪测量结果的影响因素  地址:http://wszmqma.com/gongsi/522.html

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