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KMID : 1134820120410081134
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Journal of the Korean Society of Food Science and Nutrition
2012 Volume.41 No. 8 p.1134 ~ p.1143
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The Content of Macrominerals in Beverages, Liquid Teas, and Liquid Coffees
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Kim Sung-Dan
Moon Hyun-Kyung
Park Ju-Sung
Yang Hye-Ran
Lee Yun-Jeong
Han Eun-Jung
Lee Yong-Chul
Shin Gi-Young
Kim Jung-Hun
Chae Young-Zoo
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Abstract
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The aims of this study were to investigate some macrominerals (Na, Ca, P, K, Mg) in 207 beverages, 19 liquid teas, and 24 liquid coffees. The samples were digested by microwave and determinations of macrominerals were carried out by an Inductively Coupled Plasma Optical Emission Spectrometer (ICP-OES). The elements, listed in order of mean value of macromineral content, were potassium 208.4±298.2 mg/L (72.2±169.8 mg/container)> calcium 89.0±161.0 mg/L (26.0±57.7 mg/container)> sodium 71.2±75.0 mg/L (20.9±27.9 mg/container)> phosphorus 55.6±91.9 mg/L (17.9±33.8 mg/container)> magnesium 6.1±18.4 mg/L (2.4±10.1 mg/container). All 250 samples contained sodium and potassium, and the detection rate of calcium, phosphorus and magnesium was 88.4%, 93.2%, and 20.4%. The mean ratio of phosphorus to calcium in beverages, liquid teas, and liquid coffees was 4.2±16.0 (ND～164.4), and sports drinks showed the highest mean ratio (48.5±75.6) significantly (p<0.05). In case of sodium, detected content exceeding labeling regulations (less then 120%) was observed in 12 samples (5.5%).
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KEYWORD
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macrominerals, beverages, microwave digestion, ICP-OES
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