含能材料2024，Vol.32Issue(5)：537-544,8.DOI:10.11943/CJEM2023203
紫外分光光度计法测定硝化纤维素含氮量
Determination of Nitrogen Content of Nitrocellulose by Ultraviolet Spectrophotometer
薛会会 1黄娟 1张阿磊 2陈可泉 2周杰 1丁亚军 1肖忠良1
作者信息
- 1. 南京理工大学化学与化工学院,江苏 南京 210094||南京理工大学 特种能源材料教育部重点实验室,江苏 南京 210094
- 2. 南京工业大学生物与制药工程学院,江苏 南京 211816
- 折叠
摘要
Abstract
A green non-toxic,easy and accuracy analysis method of the nitrogen content in nitrocellulose(NC)was investigated by using ultraviolet spectrophotometer,which was based on a linear relationship between the nitrogen content of NC and the molar ratio of nitrite-to-nitrate ions released after alkaline hydrolysis.Under the same reaction condition,five NC standard samlpes with known nitrogen contents were hydrolyzed.The concentrations of NO2-and NO3-in the hydrolysate were measured by the ultraviolet spectrophotometer,and the reaction condition of measuring system was optimized.The linear relationship be-tween the nitrogen content of NC standards(x)and the molar ratio of nitrite-to-nitrate ions(y)was determined by the least squares method.Finally,three NC samples were used to evaluate the proposed method.Results show that the concentration of NO2-and NO3-in alkaline hydrolysate can be measured simultaneously by ultraviolet spectrophotometer,and the most suitable reaction condition is as follows:the concentration of sulfamic acid of 20 g·L-1,and the process time of 30 min.Under the opti-mal reaction condition,the linear relationship between x and y is obtained,and the R2 is 0.9893.The verification results of NCA,NCB and NCC reveal that the nitrogen content determined by ultraviolet spectrophotometer and actual nitrogen contents are in good agreement.The relative standard deviation(n=4)values are all less than 0.150%.关键词
硝化纤维素(NC)/含氮量/紫外分光光度计/NO2-和NO3-测定Key words
nitrocellulose(NC)/nitrogen content/ultraviolet spectrophotometer/determination of NO2- and NO3-分类
军事科技引用本文复制引用
薛会会,黄娟,张阿磊,陈可泉,周杰,丁亚军,肖忠良..紫外分光光度计法测定硝化纤维素含氮量[J].含能材料,2024,32(5):537-544,8.
