The Copper Content of Cows’ Milk

Supplee, G.C.; Bellis, B.

doi:10.3168/jds.s0022-0302(22)94174-8

Cited by 48 publications

(13 citation statements)

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“…Milk contains a small amount of copper. Some researchers found the amounts of Cu in the milk of individual varied from 0.2 to 0.8 mg/ kg [20]. Contrary to this findings, in current study the average values of Cu in cow milk was 4.404 mg/kg.…”

Section: Discussioncontrasting

confidence: 97%

Contamination of Cow Milk by Heavy Metals in Serbia

Davidov

Kovačević

Strojanovic

et al. 2019

Acta Scientiae. Vet.

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Background: Dairy cows are exposed to numerous environmental hazards, such as heavy metals. Milk and dairy products could be harmful to humans when maximum tolerable amounts of heavy metals are exceeded. Analysis of heavy metals in milk is important because milk is a source of essential nutrients and is an indicator of environmental contamination. Some heavy metals are essential to maintain proper metabolic activity in living organisms, but at exceeded levels they could be toxic to living organisms. The main objective of the present study was to determine the residue levels of ten heavy metals (As, Cd, Co, Cr, Cu, Fe, Mn, Ni, Pb and Zn) in cow milk in Serbia. Materials, Methods & Results:The experiment was conducted at three farms at Vojvodina district, Serbia. Cows from all three farms were on pasture during spring and summer time. Randomly 50 cows from each farm were taken for this experiment. The cows have similar body condition score they were in their third or fourth lactation and gave approximately the same amount of milk in the previous lactation. Total 150 milk samples were collected from cows during the morning milking, in the period between April to May in 2016. All 150 milk samples were transported to laboratory as soon as possible and analyzed for the heavy metals. Heavy metals were analyzed by Inductance coupled plasma -optical emission spectrometry. Data are presented as mean values ± sd. Statistical analysis was done by one way repeated measures analysis of variance (ANOVA). The level of significance was set at P < 0.05. The highest average concentration in cow milk was determined for Iron (283.9 mg/kg), then for Zinc (60.21 mg/kg) and Copper (4.404 mg/kg), while the lowest concentration was for Cobalt and Lead (less than 0.005 mg/kg). Discussion: Bioaccumulation is one of the biggest problems with heavy metals. Heavy metals residues in milk can be very dangerous for the calves and humans as well. The existence of trace elements and heavy metals in dairy products and milk has been recorded in various countries since it is considered as one of the most dangerous aspects of food contamination. The presence of heavy metals in cow's milk may be attributed to contamination due to exposure of lactating cow to environmental pollution or consumption of contaminated feeding stuffs and water. Heavy metals after intake in cow organism distributed to all organs and glands such as udder. By that, secretory udder tissue gets intoxicated with heavy metals and after that they can be found in milk. After analyses the results in this experiment the highest average concentration of Fe in cow milk it might be because cows were fed with hay from pasture rich in iron between April to May. Some researchers found the amounts of Cu in the milk of individual varied from 0.2 to 0.8 mg/kg. Contrary to this finding, in current study the average value of Cu in cow milk was 4.404 mg/kg. It is found that the highest concentration of Zn in cow milk is 10.75 mg/kg, lower compare to result in current study (60.21 mg/kg). Arsenic (As...

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Section: Discussioncontrasting

confidence: 97%

Contamination of Cow Milk by Heavy Metals in Serbia

Davidov

Kovačević

Strojanovic

et al. 2019

Acta Scientiae. Vet.

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“…même degré que dans les conduites des régénérateurs, . [19] ont été les premiers à constater ce 'fait; nos expériences ont confirmé leurs données. Quand ce lait est frais, le pH est élevé, généralement aux environs de 6,6-6,7 ; donc, la corrosion par l'acide est insignifiante.…”

Section: Des Degrés De Corrosionunclassified

La corrosion des métaux par le lait (Fin.)

Fink

Rohrman

1935

Lait

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“…La teneur normale en fer du lait peutrêtre considérée comme (1) Reproduction interdite sans Indlcation.de source; (2) [1]. Mais les déter-minations de la teneur normale en cuivre du lait ont donné des valeurs qui varient avec la méthode de dosage employée.…”

Section: Le Lait Naturel Liquide Et Le Lait Sec Dans L'étiologie De Cunclassified

“…Mais les déter-minations de la teneur normale en cuivre du lait ont donné des valeurs qui varient avec la méthode de dosage employée. Jusqu'à présent, on ne connaît avec certitude que la limite supérieure de cette teneur; elle est d'environ 750 1/1 [2]. La plupart des auteurs admettent une valeur d'environ un tiers de la valeur maximum comme normale Quoi qu'il en soit, la teneur normale en métaux lourds du lait est si faible qU'OI:.…”

Section: Le Lait Naturel Liquide Et Le Lait Sec Dans L'étiologie De Cunclassified