Determination of Nutrients and Trace Metal Elements of Koumiss in West Wuzhumuqin in Xilinguole in Inner Mongolia and the Analysis of Environmental Influence Factor

In this paper, the nutrients and trace metal elements of koumiss which brewed by the herdsmen in West Wuzhumuqin (Xiwuqi) in Xilinguole in Inner Mongolia of China were determined. The results showed that there were many nutritional components such as proteins, fat, lactose, ash, vitamins and amino acids in koumiss. For example, the amino acids content of koumiss was 2.194%, higher than that of fresh mare’s milk (1.483%). The measurement of trace metal elements indicated that the koumiss riches in essential and non-essential trace metal elements, the concentrations of essential trace metal elements including human body such as Zn, Cu, V, Cr, Ni, Co, Mo reached 2415.000, 139.000, 126.000, 98.600, 43.400, 4.220 and 2.530μg/g, respectively. In addition, there were some useful trace elements as Sr, Rb, Ba, Li and 12 kinds of rare-earth elements. But the Pb, which is a non-essential metal element, reached a higher level of 5.580μg/g, and was 110 times than the limit value of food safety standards of China. Preliminary analysis indicated that the koumiss in Xiwuqi is a good acid beverage with high nutritional value and health effects. The trace contents of rare-earth elements, which may come from the feed addictives, were beneficial for people’s health. Excessive concentration of Pb may come from the contaminations of non-ferrous metal metallurgy and automobile exhaust in the locality.