우리나라 일부 우유의 무기질 함량조성에 관한 연구

Composition of Mineral Contents in Korean Cow`s Milk

This study was performed to investigate and assess the composition of mineral and macronutrient contents in Korean cow s milk. 48 individual farm raw milk, 10 plant raw milk and 29 market milk were collected from June to August in 2003. The minerals such as calcium(Ca), potassium(K), magnesium(Mg), sodium(Na), zinc(Zn), iron(Fe) and phosphorus(P) were determined by using atomic absorption spectrometer(AAS). The macronutrients such as fat, protein and lactose were tested by using IR spectrometer. The obtained analytical results of minerals(mg/100 g) and mactronutrients (%) are as follows : 1. In case of raw cow s milk ; Ca 113.56, K 144.09, Mg 10.86, Na 42.53, Zn 0.42, Fe 0.030, P 113.32, fat 3.85, protein 3.08, lactose 4.80, 2. In case of market cow s milk ; Ca 103.04, K 142.46, Mg 10.27, Na 43.21, Zn 0.40, Fe 0.034, P 97.30, fat 3.78, protein 3.05, lactose 4.70, 3. In case of fortified market cow s milk ; Ca 165.40, K 145.79, Mg 10.57, Na 42.55, Zn 0.57, Fe 0.414, P 94.68, fat 3.74, protein 3.08, lactose 4.68, 4. In case of processed market cow s milk ; Ca 134.72, K 142.74, Mg 10.33, Na 45.07, Zn 0.50, Fe 0.650, P 92.48, fat 3.72, protein 3.07, lactose 4.74. According to the group of market milk(milk, fortified market cow s milk, processed market cow s milk), the mean concentration of Ca and Fe were significantly higher in fortified and processed milk than milk(p<0.05). There were no significant differences in macronutrient(fat, protein, lactose) and mineral contents between pasteurized milk and UHT(ultra high temperature) treated milk(a=0.05). The labeled 　Nutritional Facts　 of market milk were satisfied with 　Labeling Standards for Livestock Products of Korea　. The measured mean concentrations of Ca, Fe, Zn were generally higher than lower limit of labeled value(above 80% of labeled value). The mean concentration of sodium was lower than upper limit of labeled value(below 120% of labeled value).