不同种类烟草中氨含量检测准确性分析及其不确定度
Analysis on Accuracy and Uncertainty in Determination of Ammonia in Different Kinds of Tobacco
刘威 1涂安婷 1徐其敏1
作者信息
- 1. 华环国际烟草有限公司,安徽省滁州市凤阳县门台子工业园,安徽滁州 233121
- 折叠
摘要
[目的]对检测过程中工作曲线浓度范围的选取进行研究分析,以提高不同种类烟草制品中氨含量的测定准确性.[方法]将各类烟草制品按氨含量划分4个区域,并绘制3条浓度范围较小的工作标准曲线(0.2~2.0、1.0~10.0、10.0~100.0 mg/L)用于分析测定.[结果]工作曲线浓度范围对检测结果有显著影响,浓度范围越大则低浓度样品检测结果的准确度和精密度越低.检测结果RSDmax<0.9%,回收率在99.9%~100.7%,3个典型烟样氨含量的测量不确定度如下:烤烟1为(0.042 5±0.001 6)‰,香料烟为(0.437±0.012)‰,白肋烟1为(5.04±0.13)‰.[结论]上述区间划分合理,检测数据准确、可靠.
Abstract
[Objective] The aim was to study the concentration range of calibration curve to improve the accuracy of the determination of ammonia in different kinds of tobacco with continuous flow method.[Method] Three different calibration curves were drawn for determination of ammonia content in different tobacco and the concentration range of standard solution was 0.2-2.0 mg/L, 1.0-10.0 mg/L and 10.0-100.0 mg/L, respectively.The uncertainty of this measurement was analyzed and assessed.[Result] Tobacco products were divided into 4 groups according to ammonia content.The concentration range of calibration curve had a significant influence on the test results, that was the greater the concentration range, the lower the accuracy and precision of test results.The RSDmax was less than 0.9%, and the rate of recovery was 99.9%-100.7%.The uncertainty of this measurement were as followed: (0.042 5±0.001 6)‰ for flue-cured tobacco 1, (0.437±0.012)‰ for oriental tobacco, (5.04±0.13)‰ for burley 1.[Conclusion] The above interval differentiate was reasonable, and the detection data was accurate and reliable.
关键词
氨/工作曲线浓度范围/区间划分/不确定度Key words
Ammonia/Work curve concentration range/Interval differentiate/Uncertainty引用本文复制引用
出版年
2017
国家科技期刊平台
NSTL
维普
万方数据