The Effect of Ozone on Aflatoxin M1, Oxidative Stability,Carotenoid Content and the Microbial Count of Milk |
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Authors: | Hesam Mohammadi Seyed Mohammad Mazloomi Mahmoud Aminlari Mehrdad Niakousari |
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Affiliation: | 1. Department of Food Science and Technology, School of Agriculture, Shiraz University, Shiraz 71441-65186, Iran;2. Nutrition Research Center, Department of Food Hygiene and Quality Control, School of Nutrition and Food Sciences, Shiraz University of Medical Sciences, Shiraz 71348-14336, Iran |
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Abstract: | In the current investigation, attempts were made to determine if ozone treatment can affect the aflatoxin M1 (AFM1) content of milk. Aflatoxin M1 by a pre-determined concentration of 0.56 μg/Kg was added to milk. Milk samples, were then exposed to gaseous ozone (80 mg/min) in containers for durations of 0, 0.5, 1, 2, 5 and 10 min. The longer exposure time to ozone was more efficient in breaking down the AFM1 in milk. Results indicated that AFM1 was reduced by 50%, when milk was ozonated at for 5 min. The pH and oxidation value of milk did not change significanty as a result of the treatments. The β-carotene content was significantly reduced and the total microbial count in milk decreased parallel to the longer exposure time. Also, it was through this longer exposure time by ozone that the L* values of milk increased significantly (p < 0.05), while the b* values significantly decreased. To the best of our knowledge, this is the first study that uses ozone to degrade AFM1 in milk. |
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Keywords: | Ozone Aflatoxin M1 β-carotene Milk Physicochemical Properties |
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