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首页> 外文会议>Sensing for Agriculture and Food Quality and Safety IX >Detecting Benzoyl Peroxide in Wheat Flour by Line-Scan Macro-Scale Raman Chemical Imaging
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Detecting Benzoyl Peroxide in Wheat Flour by Line-Scan Macro-Scale Raman Chemical Imaging

机译：线扫描宏观拉曼化学成像技术检测小麦粉中的过氧化苯甲酰

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摘要

Excessive use of benzoyl peroxide (BPO, a bleaching agent) in wheat flour can destroy flour nutrients and cause diseases to consumers. A macro-scale Raman chemical imaging method was developed for direct detection of BPO mixed in the wheat flour. A 785 nm line laser was used in a line-scan Hyperspectral Raman imaging system. Raman images were collected from wheat flour mixed with BPO at eight concentrations (w/w) from 50 to 6,400 ppm. A sample holder (150×100×2 mm~3) was used to present a thin layer (2 mm thick) of the powdered sample for image acquisition. A baseline correction method was used to correct the fluctuating fluorescence signals from the wheat flour. To isolate BPO particles from the flour background, a simple thresholding method was applied to the single-band fluorescence-free images at a unique Raman peak wavenumber (i.e., 1001 cm~(-1)) preselected for the BPO detection. Chemical images were created to detect and map the BPO particles. Limit of detection for the BPO was estimated in the order of 50 ppm, which is on the same level with regulatory standards.
机译：小麦粉中过量使用过氧化苯甲酰（BPO，一种漂白剂）会破坏面粉中的营养成分并给消费者带来疾病。开发了一种大规模拉曼化学成像方法，用于直接检测小麦粉中混合的BPO。在行扫描高光谱拉曼成像系统中使用了785 nm线激光器。从混合了BPO的小麦面粉中以50至6,400 ppm的八种浓度（w / w）收集拉曼图像。使用样品架（150×100×2 mm〜3）呈现粉末状样品的薄层（2 mm厚）以进行图像采集。使用基线校正方法校正来自小麦粉的波动荧光信号。为了从面粉背景中分离出BPO颗粒，将一种简单的阈值方法应用于预先选择用于BPO检测的独特拉曼峰波数（即1001 cm〜（-1））的单波段无荧光图像。创建化学图像以检测和绘制BPO颗粒。估计BPO的检出限约为50 ppm，与法规标准处于同一水平。

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  • 来源
  • 会议地点 Anaheim(US)
  • 作者

    Jianwei Qin; Moon S. Kim; Kuanglin Chao; Maria Gonzalez; Byoung-Kwan Cho;

  • 作者单位

    USDA-ARS Environmental Microbial and Food Safety Laboratory, Bldg. 303, BARC-East, 10300 Baltimore Ave., Beltsville, MD USA 20705;

    USDA-ARS Environmental Microbial and Food Safety Laboratory, Bldg. 303, BARC-East, 10300 Baltimore Ave., Beltsville, MD USA 20705;

    USDA-ARS Environmental Microbial and Food Safety Laboratory, Bldg. 303, BARC-East, 10300 Baltimore Ave., Beltsville, MD USA 20705;

    Department of Industrial Engineering, New Mexico State University, 1780 E University Ave., Las Cruces, NM USA 88003;

    Department of Biosystems Machinery Engineering, College of Agricultural and Life Science, Chungnam National University, 99 Daehak-ro, Yuseoung-gu, Daejeon South Korea 305-764;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Raman spectroscopy; chemical imaging; wheat flour; benzoyl peroxide; food authentication; food safety;

    机译：拉曼光谱化学成像面粉;过氧化苯甲酰;食品认证；食品安全;

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