近红外技术应用于成品卷烟的内在质量稳定性控制

以某品牌卷烟为例,采用傅立叶变换近红外光谱技术采集成品卷烟的近红外光谱,结合连续流动法测定样品中还原糖、烟碱、氯、钾含量的数据,采用偏最小二乘法(PLS)分别建立了预测品牌卷烟烟丝中还原糖、烟碱、氯、钾及糖碱比、钾氯比的近红外模型,模型的相关系数(除钾外)都在0.95以上。用建立的模型快速检测红狼卷烟的各化学成分,通过值的波动范围初步监控成品的质量稳定性。并采集它们的近红外光谱,应用连续小波变换(CWT)对原始光谱进行预处理,再对CWT系数进行主成分分析(PCA),在PCA分析的基础上引入马氏距离算法建立成品卷烟质量稳定性评价模型。通过研究光谱预处理对卷烟样品分类鉴别的影响,确定马氏距离阈值Dthro,结合近红外定量测定值与马氏距离阈值Dthro,对卷烟产品质量稳定性进行评价和控制。

Application of the NIR Spectroscopy to the Control of the Qualitative Stability of the Manufactured Cigarette

Taking a certain brand of cigarettes as an example,which applied Fourier transform near-infrared Spectrum spectroscopy to acquire near-infrared spectroscopy of manufactured cigarettes,combines with autoanalyzer to determine the data of reducing sugar,nicotine,chlorine,potassium in the sample,and uses PLS to establish the near-infrared model to predict the ingredients of the brand tobacco:reducing sugar,nicotine,the ratio between them,chlorine,potassium and the ratio between them,getting the correlation coef...