为提高检测再造烟叶中总氮含量的检测效率，对杜马斯燃烧法（简称D法）和连续流动法（简称L法）进行了对比研究，并初步探索了转换D法结果来代替L法结果的方法。结果表明：杜马斯燃烧法结果普遍高于连续流动法结果，两种方法均具有良好的精密度和准确度。在提高检测效率、降低人员劳动强度和环境污染方面，杜马斯燃烧法优势明显。杜马斯燃烧法结果应用比值系数K（K=DN/LN）进行换算即可代替连续流动法结果。

Aiming to improve efficiency of determination of total nitrogen in samples of reconstituted tobacco, a comparative study between Dumas combustion method (D method) and continuous flow method (L method) was carried out, and a preliminary investigation to use the results obtained by D method instead of those found by L method, through certain conversion, was also made. Good precision and accuracy were obtained by either of the 2 methods, and the results of total nitrogen found by the D method were generally higher. But on the whole, the D method had obvious advantages on having higher analytical efficiency, lower labouring intensity and less environmental pollution. It was shown that the results found by D method could be converted to values of L method by applying the ratio coefficient K (K=DN/LN).