KDN係列凱氏定氮儀shiceliangdanhanliangdezuichangyongyiqi
，genjujingdiandekaishidingdanfayanzhi，jingguozhemeduonian，yiqiyeyoulegengxindiedai。weilefangbiandajiashunlikaizhanshiyan，xiaobianweidajiazhenglileyifenzuixindekaishidingdanyicaozuofangfa。

    1. 儀器安裝
    jiangpeijianzhongdeguijiaoguangenjushijixuqiujianchengbutongdechangdu，bingqielianjiehao。zhengliushuijinkouhejianyejinkoudeguijiaoguanlingyiduanbixujinpaozaisuoduiyingdeyemianyixia。zhengliushuichukouhelengqueshuichukoudeguijiaoguanlingyiduanfangrupaishuichi。lengqueshuijinkoulianjiezilaishuilongtou。zaiyiqizhengmianzuocetuopanshanganfangkongdexiaohuaguan，youcefangzhuixingping
，charudaixiangpisaidebolizui。
    2. 儀器檢測
    (1)打開水龍頭開關，注意流量
，控製在3-4L/fenzhong。jieshangdianyuanxian，dakaidianyuanzongkaiguan。yiqikaishizidongjiashui，congcemianshaobeishuiweiguancekoukeyikanjianshaobeineideshuiweishangsheng，yiduanshijianhouhuizidongtingzhijiashui。
    (2)打開加堿按鈕，加堿量大概在30mL左右時
，關閉加堿按鈕。接著打開蒸餾按鈕

，儀器開始蒸餾。儀器工作10分鍾左右
，關閉蒸餾按鈕，儀器停止蒸餾
，整機檢測完成。
    3. 實驗蒸餾
    在zai消xiao化hua管guan托tuo盤pan上shang換huan上shang已yi消xiao化hua完wan成cheng並bing冷leng卻que稀xi釋shi後hou的de樣yang品pin，右you側ce換huan成cheng準zhun備bei好hao的de錐zhui形xing瓶ping，調tiao整zheng氨an氣qi回hui流liu玻bo璃li嘴zui和he瓶ping塞sai，使shi玻bo璃li嘴zui浸jin泡pao在zai硼peng酸suan液ye麵mian以yi下xia。然ran後hou先xian打da開kai加jia堿jian按an鈕niu，加jia到dao自zi己ji所suo需xu要yao的de堿jian的de用yong量liang後hou，關guan閉bi加jia堿jian按an鈕niu。然ran後hou再zai打da開kai蒸zheng餾liu按an鈕niu。蒸zheng餾liu即ji將jiang完wan成cheng後hou，提ti起qi橡xiang皮pi塞sai，移yi開kai錐zhui形xing瓶ping，使shi氨an氣qi回hui流liu玻bo璃li嘴zui離li開kai液ye麵mian，用yong蒸zheng餾liu水shui衝chong洗xi玻bo璃li嘴zui外wai壁bi，繼ji續xu蒸zheng餾liu10秒鍾後，關閉蒸餾按鈕，取下錐形瓶待滴定
、計算。