目前在实验室要建立微量杜马(Dumas)定氮法,会遇到器材和装置等困难问题,因为有些器材市上没有出售,如微量量氮计、固定燃烧电炉等。微量量氮计需向玻璃仪器厂订制,制成后需要自己进行刻度校正。固定燃烧电炉虽然在有煤气设备的实验室里可以用长煤气灯燃烧,但温度的控制不及用电炉来得容易和方便,因之我们采用固定燃烧电炉。但此种电炉市上没有出售,所以就自己设计,自己动手制造。在建立杜马装置的过程中,我们经过摸索和改进,基本上克服了设备和装置等困难,例如关于量氮计的校正方法,外文分析书中不够具体。我们按照 At present, the establishment of a trace Dumas nitrogen determination method in the laboratory will encounter difficulties such as equipment and devices because some of the devices are not sold in the market, such as micro-nitrogen meters and fixed-burning electric furnaces. Micro-amount of nitrogen need to glass equipment factory ordered, made after the need to calibrate their own scale. Although fixed-fired furnaces can be burned with long gas lamps in laboratories that have gas equipment, temperature control is less easy and easier than with electric furnaces because of our use of fixed-fired furnaces. However, this furnace is not sold on the market, so I design, do it yourself. During the establishment of the Duma device, we have basically solved the difficulties of equipment and devices through exploration and improvement. For example, the correction method of the nitrogen content analyzer is not specific enough in the foreign language analysis. Follow us