氮磷鈣測定儀是根據KDN-04型蛋白質測定儀基本上改進的，它吸收了國外先進技術，具有KDN-04型所有性能特點，並能使消化裝置的溫度在150℃－450℃範圍內任意調節
，因為將催化劑硫酸銅和硫酸鉀換成雙氧水，樣品中粗蛋白、磷、鈣實現了一次性消化，其測定結果與國家標準相符
，而且測定速度有了很大提升，受到了飼料、糧食質檢等行業的追捧。

    蛋(dan)白(bai)質(zhi)含(han)量(liang)的(de)測(ce)定(ding)是(shi)評(ping)價(jia)食(shi)品(pin)質(zhi)量(liang)的(de)重(zhong)要(yao)指(zhi)標(biao)。由(you)於(yu)食(shi)品(pin)中(zhong)含(han)氮(dan)化(hua)合(he)物(wu)以(yi)蛋(dan)白(bai)質(zhi)占(zhan)優(you)勢(shi)，所(suo)以(yi)測(ce)定(ding)食(shi)品(pin)中(zhong)蛋(dan)白(bai)質(zhi)含(han)量(liang)時(shi)往(wang)往(wang)是(shi)先(xian)測(ce)定(ding)總(zong)氮(dan)量(liang)，然(ran)後(hou)乘(cheng)以(yi)蛋(dan)白(bai)質(zhi)換(huan)算(suan)係(xi)數(shu)即(ji)得(de)到(dao)蛋(dan)白(bai)質(zhi)含(han)量(liang)。目(mu)前(qian)
，應(ying)用(yong)最(zui)廣(guang)泛(fan)、最精準的方式還是采用氮磷鈣測定儀。實驗中，在完成樣品和空白蒸餾後，對樣品進行滴定。首先
，要用酸式微量滴定管以0.0100mol/Ldebiaozhunyansuanrongyejinxingdiding。daidizhipingneirongyechenganhuiseshi，yongzhengliushuijiangzhuixingpingneibisizhoulinxiyici。ruozhenyaohoufuxianlvse，yingzaixiaoxindirubiaozhunyansuanrongyebandi
，zhenyaoguanchapingneirongyeyansebianhua，anhuisezaiyierfenzhongneibubian，dangshiweidaodadidingzhongdian。ruochengfenhongse，biaomingyichaoyuedidingzhongdian

，kezaiyididinghaoyongdebiaozhunyansuanrongyeyongliangzhongjianqu0.02mL，每(mei)組(zu)樣(yang)品(pin)的(de)定(ding)氮(dan)終(zhong)點(dian)顏(yan)色(se)必(bi)須(xu)完(wan)全(quan)一(yi)致(zhi)。空(kong)白(bai)對(dui)照(zhao)液(ye)接(jie)受(shou)瓶(ping)內(nei)的(de)溶(rong)液(ye)顏(yan)色(se)不(bu)變(bian)或(huo)略(lve)有(you)變(bian)化(hua)尚(shang)未(wei)出(chu)現(xian)綠(lv)色(se)

，可(ke)以(yi)不(bu)滴(di)定(ding)。記(ji)錄(lu)每(mei)次(ci)滴(di)定(ding)耗(hao)用(yong)標(biao)準(zhun)鹽(yan)酸(suan)溶(rong)液(ye)毫(hao)升(sheng)數(shu)，供(gong)最(zui)終(zhong)計(ji)算(suan)用(yong)。
    chucizhiwai，womenzaiyingyongdanlingaicedingyideguochengzhong，haixuyaozhuyisuoyoushijijunyongbuhanandezhengliushuipeizhi，zhengqifashengpingzhongshuichengsuanxing，yifangzaijianxingshishuizhongyoulianbeizhengchuerdaozhijieguopiangao。zhebujinguanxidaoshiyandexiaoguo，haiguanxidaogongzuorenyuanderenshenanquan
，yinci，yiqiyidingyaoanzhaoshiyongshuomingguifancaozuocaixing。