杜马斯燃烧法与连续流动法测定再造烟叶中总氮量的比较

Comparison between Dumas Combustion Method and Continuous Flow Method for Determination of Total Nitrogen in Reconstituted Tobacco

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）.