Lange R, Friebe R, Linow F
Nahrung. 1979;23(5):549-59. doi: 10.1002/food.19790230510.
The authors describe the design and the mode of operation of a partially automated analyzer system, based on the combination of the Kjeldahl wet digestion with the Berthelot reaction, for the determination of nitrogen in biological materials. The results from three years of operation are discussed from the view-points of variability of the materials to be tested, of accuracy and of precision. This analytical technique (with an accuracy of 98% and a precision of 4%) is suited for determining amino and amido nitrogen as well as non-aromatically bound ring nitrogen. The statistical evaluation of the analytical results revealed that the deviation of the measured values is mainly caused by the high-temperature digestion.
作者描述了一种部分自动化分析仪系统的设计和操作模式，该系统基于凯氏湿消化法与伯塞洛特反应的结合，用于测定生物材料中的氮。从待测试材料的变异性、准确性和精密度的角度讨论了三年运行的结果。这种分析技术（准确度为98%，精密度为4%）适用于测定氨基氮、酰胺氮以及非芳香族结合的环氮。对分析结果的统计评估表明，测量值的偏差主要是由高温消化引起的。
