該儀器(qi)采用(yong)(yong)凱(kai)氏定(ding)氮(dan)(dan)法檢測物品(pin)(pin)(pin)(pin)氮(dan)(dan)含(han)量(liang)(liang)以(yi)(yi)及蛋白(bai)質含(han)量(liang)(liang)計算的專(zhuan)用(yong)(yong)儀器(qi)，能夠(gou)對糧食、食品(pin)(pin)(pin)(pin)、飼料、土壤(rang)(rang)、乳制品(pin)(pin)(pin)(pin)、飲料等多(duo)種(zhong)物品(pin)(pin)(pin)(pin)進行檢測，過程全(quan)自(zi)(zi)動(dong)(dong)控(kong)制，可(ke)(ke)實現一鍵式(shi)自(zi)(zi)動(dong)(dong)添(tian)加實際、自(zi)(zi)動(dong)(dong)蒸(zheng)餾(liu)分離樣品(pin)(pin)(pin)(pin)、自(zi)(zi)動(dong)(dong)終(zhong)止蒸(zheng)餾(liu)等。定(ding)氮(dan)(dan)儀的使用(yong)(yong)，能夠(gou)快速(su)測定(ding)樣品(pin)(pin)(pin)(pin)的氮(dan)(dan)含(han)量(liang)(liang)，配以(yi)(yi)相(xiang)應的措施可(ke)(ke)以(yi)(yi)有效控(kong)制氮(dan)(dan)含(han)量(liang)(liang)：測定(ding)土壤(rang)(rang)中的氮(dan)(dan)含(han)量(liang)(liang)，可(ke)(ke)以(yi)(yi)直接(jie)其是否缺少(shao)氮(dan)(dan)含(han)量(liang)(liang)，是否超標。氮(dan)(dan)含(han)量(liang)(liang)缺少(shao)，我們可(ke)(ke)以(yi)(yi)使用(yong)(yong)氮(dan)(dan)肥(fei)提高土壤(rang)(rang)氮(dan)(dan)含(han)量(liang)(liang)，反(fan)之我們可(ke)(ke)以(yi)(yi)減(jian)少(shao)氮(dan)(dan)肥(fei)的使用(yong)(yong)。 從定(ding)(ding)(ding)氮(dan)(dan)(dan)(dan)原理(li)可以知(zhi)道：凱氏定(ding)(ding)(ding)氮(dan)(dan)(dan)(dan)法是(shi)(shi)將含(han)(han)氮(dan)(dan)(dan)(dan)有機物(wu)轉變為無機氮(dan)(dan)(dan)(dan)硫酸(suan)銨來進行檢測(ce)，以得(de)到含(han)(han)氮(dan)(dan)(dan)(dan)量(liang)(liang)的測(ce)定(ding)(ding)(ding)值(zhi)乘以一定(ding)(ding)(ding)系數(shu)得(de)出(chu)蛋(dan)(dan)白(bai)質(zhi)含(han)(han)量(liang)(liang)。而含(han)(han)氮(dan)(dan)(dan)(dan)有機物(wu)不僅僅是(shi)(shi)蛋(dan)(dan)白(bai)質(zhi)，還有三(san)(san)聚氰(qing)胺等(deng)等(deng)。在加(jia)上(shang)食品(pin)中蛋(dan)(dan)白(bai)質(zhi)含(han)(han)量(liang)(liang)的現(xian)行國家標(biao)準和國際通行測(ce)定(ding)(ding)(ding)方法是(shi)(shi)經典(dian)凱氏定(ding)(ding)(ding)氮(dan)(dan)(dan)(dan)法，這就(jiu)為造假者提供(gong)了可乘之機。蛋(dan)(dan)白(bai)質(zhi)中的含(han)(han)氮(dan)(dan)(dan)(dan)量(liang)(liang)不超(chao)過30%，三(san)(san)聚氰(qing)胺的最大的特點是(shi)(shi)含(han)(han)氮(dan)(dan)(dan)(dan)量(liang)(liang)很高（66%），溶于水后(hou)無色無味，也就(jiu)是(shi)(shi)說在一杯(bei)清水中加(jia)入三(san)(san)聚氰(qing)胺，然(ran)后(hou)用(yong)凱氏定(ding)(ding)(ding)氮(dan)(dan)(dan)(dan)法檢測(ce)，結果(guo)顯示是(shi)(shi)含(han)(han)有蛋(dan)(dan)白(bai)質(zhi)的。由于“凱氏定(ding)(ding)(ding)氮(dan)(dan)(dan)(dan)法”只能(neng)測(ce)出(chu)含(han)(han)氮(dan)(dan)(dan)(dan)量(liang)(liang),并不能(neng)鑒定(ding)(ding)(ding)飼(si)料中有無違規化學物(wu)質(zhi),所以,添加(jia)三(san)(san)聚氰(qing)胺的奶粉理(li)論上(shang)可以測(ce)出(chu)較高的蛋(dan)(dan)白(bai)質(zhi)含(han)(han)量(liang)(liang)。
定氮(dan)(dan)(dan)(dan)(dan)儀的(de)(de)(de)使(shi)用(yong)，能夠快速測定樣品的(de)(de)(de)氮(dan)(dan)(dan)(dan)(dan)含(han)量(liang)(liang)，配以相應(ying)的(de)(de)(de)措施(shi)可(ke)以有效(xiao)控制氮(dan)(dan)(dan)(dan)(dan)含(han)量(liang)(liang)：測定土壤中的(de)(de)(de)氮(dan)(dan)(dan)(dan)(dan)含(han)量(liang)(liang)，可(ke)以了解(jie)其(qi)是(shi)否缺(que)少(shao)(shao)氮(dan)(dan)(dan)(dan)(dan)含(han)量(liang)(liang)，是(shi)否超標(biao)。氮(dan)(dan)(dan)(dan)(dan)含(han)量(liang)(liang)缺(que)少(shao)(shao)，我們(men)(men)可(ke)以使(shi)用(yong)氮(dan)(dan)(dan)(dan)(dan)肥(fei)提(ti)高土壤氮(dan)(dan)(dan)(dan)(dan)含(han)量(liang)(liang)，反之(zhi)我們(men)(men)可(ke)以減(jian)少(shao)(shao)氮(dan)(dan)(dan)(dan)(dan)肥(fei)的(de)(de)(de)使(shi)用(yong)。這樣能夠提(ti)高氮(dan)(dan)(dan)(dan)(dan)肥(fei)的(de)(de)(de)利(li)用(yong)率，減(jian)少(shao)(shao)氮(dan)(dan)(dan)(dan)(dan)肥(fei)對環境的(de)(de)(de)污染。減(jian)少(shao)(shao)氮(dan)(dan)(dan)(dan)(dan)肥(fei)的(de)(de)(de)開支。我們(men)(men)可(ke)以測定食品中的(de)(de)(de)氮(dan)(dan)(dan)(dan)(dan)含(han)量(liang)(liang)，防止氮(dan)(dan)(dan)(dan)(dan)含(han)量(liang)(liang)超標(biao)的(de)(de)(de)反作用(yong)。可(ke)以用(yong)于監測食品安(an)全，防止不良食品流入(ru)市場。總之(zhi)該儀器用(yong)處多多，我們(men)(men)可(ke)以廣泛使(shi)用(yong)。
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