Analysis of Concentration of Rare Earth Elements in Bottled Drinking Water by Inductively Coupled Plasma Mass Spectrometry.

Concentration of rare earth elements in bottled drinking water was analyzed by inductively coupled plasma mass spectrometry. Concentration of rare-earth elements (Y, Ce, Pr, Nd, Sm, Gd, Dy, Ho, Er, Tm, Yb, Lu) were measured about bottled drinking water of 55 kinds marketed in Japan. Concentration of rare-earth elemnts measured were under 1 ng/ml. Rare-earth elements were able to be classified to 5 groups by cluster analysis. By cluster analysis of bottled drinking water, bottled drinking water showing very near rare-earth elements composition existed. However, trend of certain constant by water resouces of bottled drinking water and classification was not recognized.