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Simultaneous detection of multiple adulterants in dry milk using macro-scale Raman chemical imaging

机译：大规模拉曼化学成像同时检测干奶中的多种掺假物

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摘要

The potential of Raman chemical imaging for simultaneously detecting multiple adulterants in milk powder was investigated. Potential chemical adulterants, including ammonium sulphate, dicyandiamide, melamine, and urea, were mixed together into skim dry milk in the concentration range of 0.1-5.0% for each adulterant. Using a 785-nm laser, a Raman imaging system acquired hyperspectral images in the wavenumber range of 102-2538 cm~(-1) for a 25×25 mm~2 area of each mixture sample, with a spatial resolution of 0.25 mm. Self-modelling mixture analysis (SMA) was used to extract pure component spectra, by which the four types of the adulterants were identified at all concentration levels based on their spectral information divergence values to the reference spectra. Raman chemical images were created using the contribution images from SMA, and their use to effectively visualise identification and spatial distribution of the multiple adulterant particles in the dry milk was demonstrated.
机译：研究了拉曼化学成像同时检测奶粉中多种杂质的潜力。将潜在的化学掺杂剂（包括硫酸铵，双氰胺，三聚氰胺和尿素）一起混合到脱脂奶粉中，每种掺杂剂的浓度范围为0.1-5.0％。使用785 nm激光，拉曼成像系统在每个混合样本的25×25 mm〜2区域内，获取了波数范围为102-2538 cm〜（-1）的高光谱图像，空间分辨率为0.25 mm。使用自建模混合分析（SMA）提取纯组分光谱，通过该纯组分光谱，根据它们与参考光谱的光谱信息散度值，在所有浓度水平下鉴定出四种掺杂物。使用来自SMA的贡献图像创建了拉曼化学图像，并证明了它们用于有效可视化干奶中多个掺假颗粒的识别和空间分布。

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  • 来源
    《Food Chemistry》 |2013年第3期|998-1007|共10页
  • 作者

    Jianwei Qin; Kuanglin Chao; Moon S. Kim;

  • 作者单位

    Environmental Microbial and Food Safety Laboratory, Henry A. Wallace Beltsville Agricultural Research Centre, Agricultural Research Service, United States Department of Agriculture, 10300 Baltimore Ave., Beltsville, MD 20705, USA;

    Environmental Microbial and Food Safety Laboratory, Henry A. Wallace Beltsville Agricultural Research Centre, Agricultural Research Service, United States Department of Agriculture, 10300 Baltimore Ave., Beltsville, MD 20705, USA;

    Environmental Microbial and Food Safety Laboratory, Henry A. Wallace Beltsville Agricultural Research Centre, Agricultural Research Service, United States Department of Agriculture, 10300 Baltimore Ave., Beltsville, MD 20705, USA;

  • 收录信息 美国《科学引文索引》(SCI);美国《生物学医学文摘》(MEDLINE);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    raman imaging; quality and safety; milk; adulterant; mixture analysis;

    机译：拉曼成像质量和安全;牛奶;掺假混合物分析;

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