title: Survey of strontium in mineral waters sold in Japan: relations of strontium to other minerals and evaluation of mineral water as a possible dietary source of strontium.
abstract: The concentrations of strontium, calcium, and magnesium in 33 brands of natural mineral waters commercially available in Japan were determined by inductively coupled plasma-atomic emission spectrometry. The geometric mean values were 94.4 microg/L for strontium, 19.1 mg/L for calcium, and 2.82 mg/L for magnesium. Wide confidence intervals of 1.96-4539 microg/L for strontium, 0.865-421 mg/L for calcium, and 0.064-123 mg/L for magnesium were observed. The significant linear relationships among the three elements over a wide distribution range suggest that the synchronized variations of these elements are regulated by the natural ecosystem and not from accidental contamination from human activities or exceptionally high natural sources. Using the results of multiple linear regression analysis, the strontium concentration can be predicted by that of calcium with the appropriate power function. The results of this study suggest that mineral water can be an important nutritional source of strontium. As trace elements imbalance is often found in older patients with chronic renal failure, we propose that close attention of trace elements intake from trendy foods or beverages is necessary to prevent this hidden problem of a rapidly aging society.
authors.affiliation: Department of Hygiene and Public Health, Osaka Medical College, 2-7, Daigakumachi, Takatsuki City, Osaka 569-8686, Japan.
authors.forename: Kan
authors.initials: K
authors.lastname: Usuda
authors.forename: Koichi
authors.initials: K
authors.lastname: Kono
authors.forename: Tomotaro
authors.initials: T
authors.lastname: Dote
authors.forename: Misuzu
authors.initials: M
authors.lastname: Watanabe
authors.forename: Hiroyasu
authors.initials: H
authors.lastname: Shimizu
authors.forename: Takashi
authors.initials: T
authors.lastname: Kawasaki
authors.forename: Satsuki
authors.initials: S
authors.lastname: Hayashi
authors.forename: Kazuo
authors.initials: K
authors.lastname: Nakasuji
authors.forename: Keiichi
authors.initials: K
authors.lastname: Fujimoto
authors.forename: Bo
authors.initials: B
authors.lastname: Lu
mesh_terms: D002118:Calcium / Q000032:analysis*; D004032:Diet; D006801:Humans; D007564:Japan; D008274:Magnesium / Q000032:analysis*; D008900:Mineral Waters / Q000032:analysis*; D013054:Spectrophotometry, Atomic; D013324:Strontium / Q000032:analysis*
chemical_list: D008900:Mineral Waters; D008274:Magnesium; D002118:Calcium; D013324:Strontium