Abstract: It is desirable to provide a gas chromatography type of chemical analysis method for estimating the change of body smell with progressive ageing of a living subject over a period of years by 1) utilization of the smell distinguishing ability of an experimental animal, 2) instrumental analysis, or 3) a combination of them. The present inventors found that the amounts of several volatile organic substances (e.g., 2-phenylacetamide, indole and phenol) present in mouse urine as substances responsible for the body smell are increased or decreased with ageing. The change in body smell with ageing of an animal can be estimated by quantitatively analyzing these compounds by an instrumental analysis method such as Y-shaped labyrinth method (involving live animals in a maze), gas chromatograph (GC) or high performance liquid chromatography (HPLC).

Abstract: Problem:

Abstract: The cluster water having a potassium ion concentration of 100 ppm or more and containing potassium ions, magnesium ions and calcium ions in a weight ratio of potassium ions:magnesium ions:calcium ions of 1:0.3-4.5:0.5-8.5 has small clusters on the average, which are retained stably for a very long period of time at ordinary temperature.