Mineral Water and Tap Water (YS-50)

Analysis of tap water and mineral water was performed using IC YS-50 (a column for cation chromatography). It turns out that many divalent cations is contained in mineral water.

Sample : Mineral water, Tap water (Water)

	Mineral water	Tap water
1. Na+	6.7ppm	7.3ppm
2. K+	0.8ppm	1.3ppm
3. Ca2+	24.8ppm	3.6ppm
4. Mg2+	71.9ppm	12.0ppm

 Column : Shodex IC YS-50 (4.6mmID*125mm)
 Eluent : 4mM Methanesulfonic acid aq.
 Flow rate : 1.0mL/min
 Detector : Suppressed conductivity
 Column temp. : 40°C