Detecting benzoyl peroxide in wheat flour by line-scan macro-scale Raman chemical imaging

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

doi:10.1117/12.2262660

1 May 2017 Detecting benzoyl peroxide in wheat flour by line-scan macro-scale Raman chemical imaging

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

Author Affiliations +

Proceedings Volume 10217, Sensing for Agriculture and Food Quality and Safety IX; 1021707 (2017) https://doi.org/10.1117/12.2262660
Event: SPIE Commercial + Scientific Sensing and Imaging, 2017, Anaheim, CA, United States

Abstract

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 mm³) 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.

Conference Presentation

Citation Download Citation

Jianwei Qin, Moon S. Kim, Kuanglin Chao, Maria Gonzalez, and Byoung-Kwan Cho "Detecting benzoyl peroxide in wheat flour by line-scan macro-scale Raman chemical imaging", Proc. SPIE 10217, Sensing for Agriculture and Food Quality and Safety IX, 1021707 (1 May 2017); https://doi.org/10.1117/12.2262660

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