Quality stability inspection of liquid contained in flavored capsules for cigarettes based on ultraviolet spectroscopy and SVR algorithm

ZHU Ling;TANG Jie;XU Jiadong;HU Xingfeng;PENG Zhong;TAN Guanglu;ZHU Lijun;Technology Center of China Tobacco Chongqing Industrial CO.,LTD;

breakable capsules;;UV spectra;;headspace-GC/MS;;SVR algorithm;;kernel function;;quality control chart

Based on ultraviolet(UV) spectroscopy and SVR(support vector machine regression) algorithm, a method for the determination and stability analysis of breakable capsules in cigarette was established. The internal liquid of breakable capsules was diluted with anhydrous ethanol, followed by UV scanning and spectral pretreatment, four SVR models of different capsule brands were established and validated. Results show that:(1) The optimal UV spectrum pretreatment method was smoothing and normalization, the optimal type of SVR was ν-SVR, and the optimal kernel function was radial basis function.(2) The correlation coefficient between predicted and measured values of the classification variables in the ν-SVR model calibration set were all more than 0.9993 for four capsule brands. The prediction accuracy of SVR model was 100% for both 400 samples of breakable capsule inner liquid(calibration set) and 80 samples of breakable capsule inner liquid(validation set) that were not involved in the modeling, indicating high accuracy and efficiency.(3) The stability of breakable capsules could be effectively evaluated by quality control chart based on classification variable values of SVR model, and the evaluation results were consistent with those of GC/MS method. It can be concluded that UV spectra combined with SVR algorithm could be used for quality evaluation of liquid in cigarette breakable capsules, and the method was rapid, accurate, economical, and environmentfriendly.