化学通报1960年第6期中登载的“克氏定氮法的簡化与改进”一篇的方法,操作手續簡单,并可大批进行分析。同时,因用适量的碱液,故能节省試剂;又因不用蒸餾的方法,故可节省不少仪器,而仅用烧杯等簡单仪器就可进行分析。因此,改进后的方法可以广泛应用于实驗设备条件差的单位。但我們发現,該法也存在着缺点,若測定时不加以注意,将使所得結果与实际相差甚远,达不到正确反映被測物质的含氮量,而在該文中并没有指出这点,因此,作者觉得有必要指出,以供使用該法的同志参考。該法測定氮的要点是,試样在多量的浓H_2SO_4作用下,使有机态的氮转化成无机态的铵盐,然后稀释一定 Chemical Bulletin No. 6, 1960 issue of “Klossarst method to simplify and improve,” an article, the operation procedure is simple, and a large number of analysis. At the same time, due to the use of an appropriate amount of lye, it can save reagents; also because of the distillation method, it can save a lot of instruments, and only simple instruments such as beakers can be analyzed. Therefore, the improved method can be widely used in experimental equipment, poor conditions of the unit. However, we found that this method also has some shortcomings. If we do not pay attention to the determination, the result will be far from the actual value and will not reach the correct content of nitrogen in the tested substance, which is not pointed out in this article Therefore, the author finds it necessary to point out for reference by comrades who use the law. The point of this method for the determination of nitrogen is that, under the action of a large amount of concentrated H 2 SO 4, the sample converts the organic nitrogen into an inorganic ammonium salt and then dilutes