土壤全氮测定工作分为消煮及蒸馏二个步骤,其中以蒸馏较为麻烦。常用的有二种蒸馏方法,一为直接加热蒸馏,另一为蒸气蒸馏(如半微量蒸馏器),这二种方法均需要冷凝设备。此外,直接加热蒸馏装置也比较繁琐,至于应用半微量蒸馏法,不但消煮液需要定容后再吸取一部分进行蒸馏,而且一个工作人员也难以同时使用二架蒸馏器,因此工作效率较低。为了进一步提高蒸馏工作的效率,我们设计了水浴通气的蒸馏方法。经过多 Determination of soil total nitrogen is divided into two steps digestion and distillation, distillation is more trouble. There are two commonly used distillation methods, one for direct heating and the other for steam distillation (such as semi-micro-distillers), both of which require condensing equipment. In addition, the direct heating distillation unit is also more cumbersome, as the application of semi-micro-distillation method, not only the digestion and decoction solution needs constant volume and then draw a part of the distillation, but also a staff member also difficult to use two distillers, so the work efficiency is lower. In order to further improve the efficiency of distillation work, we designed a distillation method for water bath ventilation. After more