Abstract
The objective of this study was to compare trace elements in milks of four species. Milk samples of 4ml or more were obtained from guinea pigs, dairy cattle, horses, and humans. The milks were analyzed for the trace elements Al, B, Ba, Cu, Fe, Li, Mn, Mo, Si, Sr, Ti, and Zn by inductively coupled argon plasma spectroscopy. Zinc ranged from more than 4ppm in guinea pig milk to less than 2ppm in mare milk. Strontium was over 1ppm in the milk of guinea pigs and less than .1ppm for the human. Iron ranged from over .7ppm for the guinea pig to less than .2ppm for the cow. Copper was over .5ppm in guinea pig milk and only .05ppm for cow milk. Boron ranged from .59 to .10ppm, Si from .58 to .16ppm, Al from .45 to .10ppm; and Ba from .22 to .08ppm in milks of the four species studied. Titanium ranged from a trace to .11ppm. Lithium, Mn, and Mo all were less than .04ppm. Milk Mn was surprisingly low relative to bodily needs.
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