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United States Department of Agriculture

Agricultural Research Service

Research Project: Development of Line-Scan Chemical Imaging Techniques for Detection of Food Contaminants and Adulterants

Location: Environmental Microbial and Food Safety Laboratory

Project Number: 1245-42000-018-20
Project Type: Specific Cooperative Agreement

Start Date: Jul 01, 2011
End Date: Jun 30, 2016

Objective:
To develop line-scan technology and design and construct macro-scale Raman chemical imaging instrumentation, and to develop methodology for macro-scale Raman imaging detection of contaminants and adulterants for food samples and food ingredients.

Approach:
Develop optical method to create laser-line illumination from a 785nm laser source. Construct Raman spectrograph with electron-multiplying charge-coupled device camera. Incorporate line laser and detector into a portable instrument for macro-scale Raman imaging of samples up to 10x20 cm in size. Develop computer programs for real-time data acquisition, data analysis, and classification. Perform system calibration/validation. Investigate contaminant and adulterant detection for food samples such as authentication of dry milk powder or other food ingredients, and detection of pesticide residues on fruits and leafy green vegetables.

Last Modified: 10/1/2014
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