Tap Water and Rain Water

Tap water and rain water were analyzed using IC Y-521. Tap water does not contain ammonium ion. However, rain water contains ammonium ion in spite of low concentration of Na⁺ and K⁺.


Sample :
Tap water (Water), 50micro-L
1. Na⁺
2. K⁺

Rain water (Water), 100micro-L
1. Na⁺
2. NH₄⁺
3. K⁺

Column       : Shodex IC Y-521 (4.6mmID*150mm)
Eluent       : 4mM HNO3 aq.
Flow rate    : 1.0mL/min
Detector     : Non-suppressed coductivity, Polarity(-)
Column temp. : 40deg-C