Preliminary Study On Classification Of Raw Cow?s Milk Using ATR-FTIR Coupled With PCA From Peninsular Malaysia

Ketty G. S. L., Khairunnisak M., Faridah I., Roosnoor F. H., Izwan I., Marni S. & Saipul B. A.R.

A classification of raw cow?s milk samples was done according to their geographical origin in Peninsular Malaysia by Makmal Kesihatan Awam Veterinar, Department of Veterinary Services Malaysia (DVS). Six hundred milk samples were collected from Perlis, Kedah, Perak, Selangor, Pahang, Negeri Sembilan, Melaka and Johor states by 26 milk collecting centre under DVS. This study was done using attenuated total reflectance fourier transform infrared (ATR-FTIR) spectroscopy method coupled with a multivariate principal component analysis (PCA). The ATR-FTIR spectra were analysed and regions of interest were found in between 2700.819 cm?1 and 2419.173 cm?1. The absorbance data of the regions were then analysed using PCA, which shows there was clustering of samples towards their geographical origin. ATR-FTIR coupled with multivariate PCA has the potential for classifying the geographical origin of raw milk produced within Peninsular Malaysia.