Detecting multiple adulterants in dry milk using Raman chemical imaging

Jianwei Qin; Kuanglin Chao; Moon S. Kim

doi:10.1117/12.918584

7 May 2012 Detecting multiple adulterants in dry milk using Raman chemical imaging

Jianwei Qin, Kuanglin Chao, Moon S. Kim

Proceedings Volume 8369, Sensing for Agriculture and Food Quality and Safety IV; 83690H (2012) https://doi.org/10.1117/12.918584
Event: SPIE Defense, Security, and Sensing, 2012, Baltimore, Maryland, United States

Abstract

This study investigated the potential of Raman chemical imaging for simultaneously detecting multiple adulterants in milk powder. Potential chemical adulterants, including ammonium sulfate, dicyandiamide, melamine, and urea, were together mixed into nonfat dry milk in the concentration range of 0.1%-5.0% for each adulterant. A benchtop point-scan Raman imaging system using a 785-nm laser was assembled to acquire hyperspectral images in the wavenumber range of 102-2538 cm^-1. Each mixture was imaged in an area of 25×25 mm² with a spatial resolution of 0.25 mm. Selfmodeling 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 visualize identification and spatial distribution of the multiple adulterant particles in the dry milk was demonstrated.

Citation Download Citation

Jianwei Qin, Kuanglin Chao, and Moon S. Kim "Detecting multiple adulterants in dry milk using Raman chemical imaging", Proc. SPIE 8369, Sensing for Agriculture and Food Quality and Safety IV, 83690H (7 May 2012); https://doi.org/10.1117/12.918584

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available