Prediction of the chemical composition of mutton with near infrared reflectance spectroscopy

Show simple item record Viljoen, Margaretha Hoffman, Louw C. Brand, T.S. 2007-07-06T07:57:32Z 2007-07-06T07:57:32Z 2007-05
dc.description.abstract Near infrared reflectance spectroscopy (NIRS) was evaluated as a tool to predict the chemical composition of freeze-dried mutton. Samples used for the ash, dry matter (DM), crude protein (CP) and fat calibrations consisted of M. longissimus dorsi (eye muscle) from 19-month-old Merino sheep, while mineral calibrations were developed with M. semimembranosus from Merino crossbreed lambs slaughtered at a live weight of 40 kg. Samples were minced, freeze-dried and analysed according to standard laboratory procedures. Samples were scanned (1100–2500 nm) and partial least-squares regression (PLSR) was used to predict the chemical and mineral composition. Multiple correlation coefficients (r) and standard error of performance (SEP) for chemical composition constituents were: ash (0.97; 0.15%), DM (0.96; 0.38%), CP (1.00; 0.92%) and fat (1.00; 0.43%), respectively. K, P, Na, Mg, Fe and Zn showed acceptable SEP values of 600, 900, 77.89, 40, 3.15 and 3.59 mg/kg, respectively. The r values ranged from 0.86 for Zn and K to 0.92 for Mg. Very low r values (0.26–0.49) were obtained for Cu, B, Mn, Ca and Al. It was concluded that NIRS could be used as a rapid tool for predicting proximate chemical composition and certain minerals in freeze-dried mutton. en
dc.description.sponsorship The Elsenburg Agricultural Research Centre partly funded this study. The authors also wish to thank the Red Meat Research and Development Trust and Technology and Human Resources for Industry Program (THRIP) of South Africa for their financial contributions. en
dc.format.extent 320267 bytes
dc.format.mimetype application/pdf
dc.identifier.citation Viljoen, M, Hoffman, LC & Brand, TS 2007, ‘Prediction of the chemical composition of mutton with near infrared reflectance spectroscopy’, Small Ruminant Research, vol.69, no. 1-3, pp. 88-94.[] en
dc.identifier.issn 0921-4488
dc.identifier.other 10.1016/j.smallrumres.2005.12.019
dc.language.iso en en
dc.publisher Elsevier en
dc.rights Elsevier en
dc.subject Chemical composition en
dc.subject Mineral composition en
dc.subject Near infrared reflectance spectroscopy en
dc.subject Analytical techniques en
dc.subject.lcsh Lamb (Meat) en
dc.subject.lcsh Spectrum analysis en
dc.subject.lcsh Mutton -- Analysis en
dc.title Prediction of the chemical composition of mutton with near infrared reflectance spectroscopy en
dc.type Postprint Article en

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