Reductions Of Aflatoxin M1 In Milk Utilizing Some Chemisorption Compounds And Study Their Effects On Milk Composition
2007
Soha, S., Office of Standards and Industrial Research of Arak Unit, Arak-Iran. | Borji, M., Research Center of Agriculture and Natural Resources of Markazy Province, Arak-Iran
This study was conducted to survey the effect of chemisorption compounds on decreasing of aflatoxin M1 from raw milk. Contaminated milk samples to aflatoxin M1 were obtained from two dairy cows that were in mid lactation and were fed with contaminated diets by aflatoxin B1 for a 20- days period. Chemisorption compounds used in this experiment were kinds of bentonite and hydrated sodium calcium alumino ’ silicate (HSCAS). The samples of contaminated milk (87.4 ng/lit aflatoxin M1) were tested in two levels (%0. 5 and %2) of these compounds in room temperature (25ثڑc, 30 minutes). Toxin decreasing, milk composition, milk pH and the residues of some elements (Al and Si) that may be present after treatment were surveyed. The kind of chemisorption compounds, applied level and their interaction had noticeable effects for decreasing of milk aflatoxin (p 0.01). Milk aflatoxin was decreased more than % 90 by bentonite B1, but decreasing of aflatoxin M1 by HSCAS and bentonite X was about % 77 and % 71 respectively. Milk composition consist of protein, fat, lactose, solid non fat and total solid were affected by addition of some adsorbents (p0.05), although values of increasing or decreasing of milk components were negligible. As a result, there were no residues of aluminium, but a low level of silicium was left in the samples that were treated with chemisorption compounds. This study showed that utilization of chemisorptions compounds had high efficiency for detoxification of aflatoxin M1 from milk. Because in this method does not usually involve degrading the toxin, milk may be free from toxin degradation products and is safe for consumption. In addition, the added material may be easily separated from milk after the substance adsorbs the toxin. Thus, this method should be developed by further researches for determining effects of these compounds on functional properties of milk.
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