关于全氮量的测定,1883年开氏(Kjeldokl)发表了蒸餾法以后,奠定了全氮量測定的基础。至1913年Winkler根据开氏法的基本原理,建議于样品消化后,在加硷蒸餾时,用硼酸吸收氨,采用混合指示剂,直接以标准酸滴定,不但灵敏度比前有了增加,且可避免回滴时产生誤差。但操作步驟繁冗,并且需要消 As for the determination of total nitrogen, Kjeldokl published the distillation method in 1883 and laid the foundation for the determination of total nitrogen. By 1913 Winkler according to the basic principle of the Kaiser’s method, it is recommended that after digestion of the sample, add alkali to the distillation, the absorption of ammonia with boric acid, the use of mixed indicator, the titration with standard acid directly, not only increased the sensitivity than before, Avoid error when back drop. However, the operation steps are cumbersome and need to be eliminated