期刊论文

Nondestructive identification of vitamin C tablets from different domestic and foreign brands by near infrared spectroscopy

中文

分析试验室

1000-0720

2020

39

4

399-404

10.13595/j.cnki.issn1000-0720.2019.062604

国家自然科学基金青年基金项目(31601551) 湖南省教育厅科学研究项目(17C0972)资助。

本校为其他机构

基于近红外光谱技术与化学计量学方法,建立了一种国内外不同品牌维生素C片的无损鉴别方法。采集了国内外8个品牌的维生素C片共计40个样本的近红外光谱数据,比较了完整样品以及粉末样品的近红外光谱,采用连续小波变换技术消除背景干扰和基线漂移,基于标准偏差与相对标准偏差的变量筛选方法筛选出具有代表性的波数点,结合主成分分析方法对国内外不同品牌维生素C片进行鉴别分析。结果表明:原始光谱存在着明显的背景干扰和基线漂移现象,且粉末样品的重现性要优于完整样品;单纯使用原始光谱无法辨别来自不同品牌的维生素C片;连续小波变换可以有效消除背景干扰,提高模型鉴别能力;完整样品的鉴别准确率...

Based on near infrared spectroscopy and chemometrics methods, a nondestructive identification method for different brands of vitamin C tablets was established. Firstly, the near infrared spectra of 40 vitamin C samples from 8 domestic and overseas brands were collected, and the spectra of the complete and powder samples were compared. Secondly, the background interference and baseline drift were eliminated by continuous wavelet transform technology. The representative wave-numbers were screened by variable selection method based on the standard deviation and relative standard deviation. Finall...