Evaluation of cold storage effect on Murrah buffalo milk yoghurt quality and safety attributes through fourier transform infrared spectroscopy and multivariate analysis

Mansor, Muzammeer and Zulkifli, Afiefah and Mohamad Lotfi, Anis Ruwaida and Abdullah Sani, Muhamad Shirwan and Al-Obaidi, Jameel R. and Nor-Khaizura, Mahmud Ab Rashid and Khatib, Alfi and Abdull Razis, Ahmad Faizal and Meor Hussin, Anis Shobirin and Selamat, Jinap and Jambari, Nuzul Noorahya (2025) Evaluation of cold storage effect on Murrah buffalo milk yoghurt quality and safety attributes through fourier transform infrared spectroscopy and multivariate analysis. Food Control, 176. pp. 1-6. ISSN 09567135

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Abstract

Buffalo milk yoghurt is valued for its flavour, nutrition, and health benefits, but storage conditions affect its quality. This study assessed physicochemical and microbiological changes in buffalo milk yoghurt during cold storage (4 ◦C) using FTIR spectroscopy and multivariate analysis. A commercial starter culture was inoculated into standardised buffalo milk, and samples were collected at six time points (0, 24, 48 h, 7, 14, and 28 days). Analyses included colour, texture, syneresis, pH, titratable acidity, water activity, and microbial counts. FTIR-OPLS-DA effectively discriminated storage times (Q2 = 0.91, R2Y = 0.979). Over time, redness (a*), yellow-ness (b*), consistency, and syneresis changed significantly, while lightness (L *) and firmness remained stable. Cohesiveness and work of cohesion decreased after 28 days. Lactic acid bacteria and total aerobic bacteria increased post-fermentation, with titratable acidity rising from 0.16 ± 0.02 to 1.64 ± 0.08 and pH dropping to 4.10 ± 0.01. These findings highlight the impact of cold storage on yoghurt quality and the effectiveness of FTIR spectroscopy for rapid assessment.

Item Type:	Article (Journal)
Uncontrolled Keywords:	Buffalo milk yoghurt; Probiotic; Cold storage; FTIR; OPLS-DA
Subjects:	Q Science > QD Chemistry
Kulliyyahs/Centres/Divisions/Institutes (Can select more than one option. Press CONTROL button):	International Institute for Halal Research and Training (INHART)
Depositing User:	Muhamad Shirwan Abdullah Sani
Date Deposited:	08 May 2025 17:51
Last Modified:	11 May 2025 14:16
URI:	http://irep.iium.edu.my/id/eprint/120915

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