A comparison of nitrogen values obtained utilizing the Kjeldahl nitrogen and Dumas combustion methodologies (Leco CNS 2000) on samples typical of an animal nutrition analytical laboratory
A comparison of nitrogen values obtained utilizing the Kjeldahl nitrogen and Dumas combustion methodologies (Leco CNS 2000) on samples typical of an animal nutrition analytical laboratory
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DOI：
10.1016/s0377-8401(98)00136-9
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发表时间：
1998-07-01
影响因子：
3.2
通讯作者：
Foster, EH
中科院分区：
文献类型：
--
作者：
Etheridge, RD;Pesti, GM;Foster, EH
使用Leco的CNS 2000分析仪的大仲马燃烧程序显示出与土壤和植物产品的凯氏定氮程序获得的氮值相当的氮值（对于大多数样品略高）。这些程序进行了比较，为一系列的样品更典型的动物营养实验室（饲料、排泄物、尸体、蛋黄、牛奶和尿液），对于比较的36个样品，凯氏定氮法得出的N值略低于大仲马法：N-Kjeldahl = 0.0103 + 0.9855 x N-CNS。标准AAFCO肉鸡和牛饲料的变异系数（在18个月期间重复测量）分别为2.23（n = 90）和2.12 g/100 g（n = 177）。得出的结论是，大仲马燃烧程序是能够取代凯氏定氮法的常规动物营养实验室氮分析。与凯氏定氮法相比，大仲马法具有使用更少的强反应物、需要更少的劳动力以及使用更有效的温度从样品中释放氮的优点。(C)1998年Elsevier Science B.V.
The Dumas combustion procedure using Leco's CNS 2000 analyzer has been shown to give nitrogen values comparable to those obtained with the Kjeldahl procedure for soil and plant products (slightly higher for most samples). These procedures were compared for a range of samples more typical for an animal nutrition laboratory (feed, excreta, carcass, egg yolk, milk and urine), For the 36 samples compared, the Kjeldahl procedure gave N values slightly lower than the Dumas procedure: N-Kjeldahl = 0.0103 + 0.9855 x N-CNS.The coefficient of variation for standard AAFCO broiler and cattle feeds (measured repeatedly over an 18-month period) were 2.23 (n = 90) and 2.12 g/100 g (n = 177), respectively. It was concluded that the Dumas combustion procedure is capable of replacing the Kjeldahl procedure for routine animal nutrition laboratory N analyses. The Dumas procedure has the advantages of using fewer strong reactants, requiring less labor, and uses a more efficient temperature to release the nitrogen from the samples than the Kjeldahl procedure. (C) 1998 Elsevier Science B.V.