Chemometric Processing of Visible and near Infrared Reflectance Spectra for Species Identification in Selected Raw Homogenised Meats

Visible and near infrared reflectance spectra (400–2498 nm) of 230 homogenised meat samples (chicken, turkey, pork, beef and lamb) were collected. Classification of the spectra into individual species was attempted using factorial discriminant analysis (FDA), soft independent modelling of class analogy (SIMCA), K-nearest neighbour analysis and discriminant partial least squares (PLS) regression. A variety of wavelength ranges and data pre-treatments were investigated for optimum accuracy. Particular difficulty was encountered in distinguishing between chicken and turkey; models were, therefore, initially developed using five separate meat classes and again using four groups, with chicken and turkey being amalgamated into a single class. In a four-group classification, the best models produced between 85 and 100% correct identifications. Using five groups, classification rates were generally lower. FDA and PLS discrimination generally produced the best accuracy rates. SIMCA exhibited the poorest classification performance.

[1]  A. Sirieix,et al.  Commercial Wheatflour Authentication by Discriminant Analysis of near Infrared Reflectance Spectra , 1993 .

[2]  K. Hargin,et al.  Investigation of methods to detect mechanically recovered meat in meat products - III: Microscopy. , 1995, Meat science.

[3]  O. Hormi,et al.  Composition of minced meat part A: Methods. , 1994, Meat science.

[4]  P. Thomsen,et al.  Differentiation of closely related species by DNA hybridization. , 1991, Meat science.

[5]  P. Geladi,et al.  Linearization and Scatter-Correction for Near-Infrared Reflectance Spectra of Meat , 1985 .

[6]  B. K. Barai,et al.  Approaches to the detection of meat adulteration , 1992 .

[7]  P. Thomsen,et al.  Species differentiation of heated meat products by DNA hybridization. , 1991, Meat science.

[8]  Y. Xiong.  Meat and meat products: Technology, chemistry and microbiology: by Alan H. Varnam and Jane P. Sutherland, Chapman & Hall, 1995. £24.99 (viii + 430 pages) ISBN 0 412 49560 0 , 1996 .

[9]  Gerard Downey,et al.  Discrimination of Raw Pork, Chicken and Turkey Meat by Spectroscopy in the Visible, Near- and Mid-infrared Ranges , 1997 .

[10]  K D Hargin,et al.  Authenticity issues in meat and meat products. , 1996, Meat science.

[11]  I. D. Lumley,et al.  Authenticity of meat and meat products , 1996 .

[12]  T. Isaksson,et al.  Meat Speciation by near Infrared Reflectance Spectroscopy on Dry Extract , 1997 .

[13]  R. Field,et al.  Identification of meat from game and domestic species , 1992 .

[14]  P. R. Kulkarni,et al.  Handbook of indices of food quality and authenticity , 1997 .

[15]  D. Bertrand,et al.  Application of Multidimensional Analyses to the Extraction of Discriminant Spectral Patterns from NIR Spectra , 1988 .