Document Detail

Use of fourier transform near-infrared reflectance spectroscopy for rapid quantification of castor bean meal in a selection of flour-based products.
MedLine Citation:
PMID:  11087454     Owner:  NLM     Status:  MEDLINE    
Methodology was developed and evaluated for the rapid detection of castor bean meal (CBM) containing the toxic protein ricin by using Fourier transform near-infrared (FT-NIR) spectroscopy and multivariate techniques. The method is intended to be a prototype to develop a more general approach to detect food tampering. Measurements were made on an FT-NIR system using a diffuse reflection-integrating sphere. Flours spiked with caffeine, crystalline sugar, and corn meal, 1-20% w/w, were used as test articles to evaluate the methodologies. Food matrices (bleached flour, wheat flour, and blueberry pancake mix) spiked with CBM (0.5-8% w/w) were analyzed. Multiplicative scatter correction transformed partial least-squares regression models, using a specific NIR spectral region, predicted CBM contamination in foods with a standard error of cross-validation of <0.6% and a coefficient of determination (R(2)) of >94%. Models discriminated between flour samples contaminated with CBM and other protein sources (egg white, soybean meal, tofu, and infant formula). CBM had loading spectra with bands characteristic of amide groups (4880 and 4555 cm(-1)) and lipids (5800, 5685, 4340, and 4261 cm(-1)).
L E Rodriguez-Saona; F S Fry; E M Calvey
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Publication Detail:
Type:  Comparative Study; Journal Article; Research Support, U.S. Gov't, Non-P.H.S.    
Journal Detail:
Title:  Journal of agricultural and food chemistry     Volume:  48     ISSN:  0021-8561     ISO Abbreviation:  J. Agric. Food Chem.     Publication Date:  2000 Nov 
Date Detail:
Created Date:  2001-01-12     Completed Date:  2001-01-12     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  0374755     Medline TA:  J Agric Food Chem     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  5169-77     Citation Subset:  IM    
Joint Institute for Food Safety and Applied Nutrition (JIFSAN)-University of Maryland Chemistry Department, 200 C Street S. W., Washington, D.C. 20204, USA.
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MeSH Terms
Caffeine / analysis
Castor Bean*
Colorimetry / methods
Enzyme-Linked Immunosorbent Assay / methods
Flour / analysis*
Multivariate Analysis
Plant Lectins
Plants, Toxic*
Ricin / analysis
Spectroscopy, Fourier Transform Infrared / methods
Sucrose / analysis
Zea mays
Reg. No./Substance:
0/Plant Lectins; 57-50-1/Sucrose; 58-08-2/Caffeine; 9009-86-3/Ricin

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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