流动分析法测定烟草中的不溶性氮和可溶性氮

Determination of Nonsoluble and Soluble Nitrogens in Tobacco with Flow Analyzer

采用流动分析法测定了10种烟草中的不溶性氟和可溶性氮。结果表明：①不溶性氟和可溶性氮的RSD分别为0．15％和0，22％，回收率各为100．4％～106．3％和90．6％～100．3％，检测限0．00006mg／mL；②性氮与可溶性氮含量之和与总氟没有显著性差异。流动分析法适合于烟草不溶性氮和可溶性氮含量的快速分析。

Nonsoluble nitrogen （NSN） and soluble nitrogen （SN） in ten tobacco samples were determined with a flow analyzer. The results showed that： 1） the RSDs of NSN and SN were 0.15% and 0.22%, the recoveries were 100.4%-106.3% and 90.6% - 100.3%, respectively; the limit of detection was 0.00006mg/mL; and 2） there was no significant difference between total nitrogen and the sum of NSN and SN. The method was suitable for rapid determination of NSN and SN in tobacco.