Application of FTIR Spectroscopy and Chemometrics for Halal Authentication of Beef Meatball Adulterated with Dog Meat

https://doi.org/10.22146/ijc.27159

Wiranti Sri Rahayu(1), Abdul Rohman(2*), Sudibyo Martono(3), Sudjadi Sudjadi(4)

(1) Faculty of Pharmacy, Universitas Gadjah Mada, Yogyakarta, 55281, Indonesia
(2) Research Center of Halal Products, Universitas Gadjah Mada, Yogyakarta, 55281, Indonesia
(3) Faculty of Pharmacy, Universitas Gadjah Mada, Yogyakarta, 55281, Indonesia
(4) Faculty of Pharmacy, Universitas Gadjah Mada, Yogyakarta, 55281, Indonesia
(*) Corresponding Author

Abstract


Beef meatball is one of the favorite meat-based food products among Indonesian community. Currently, beef is very expensive in Indonesian market compared to other common meat types such as chicken and lamb. This situation has intrigued some unethical meatball producers to replace or adulterate beef with lower priced-meat like dog meat. The objective of this study was to evaluate the capability of FTIR spectroscopy combined with chemometrics for identification and quantification of dog meat (DM) in beef meatball (BM). Meatball samples were prepared by adding DM into BM ingredients in the range of 0–100% wt/wt and were subjected to extraction using Folch method. Lipid extracts obtained from the samples were scanned using FTIR spectrophotometer at 4000–650 cm-1. Partial least square (PLS) calibration was used to quantify DM in the meatball. The results showed that combined frequency regions of 1782–1623 cm-1 and 1485-659 cm-1 using detrending treatment gave optimum prediction of DM in BM. Coefficient of determination (R2) for correlation between the actual value of DM and FTIR predicted value was 0.993 in calibration model and 0.995 in validation model. The root mean square error of calibration (RMSEC) and standard error of cross validation (SECV) were 1.63% and 2.68%, respectively. FTIR spectroscopy combined with multivariate analysis can serve as an accurate and reliable method for analysis of DM in meatball.


Keywords


dog meat; FTIR spectroscopy; chemometrics; halal authentication

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DOI: https://doi.org/10.22146/ijc.27159

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