Anions in sea water were analyzed by anion-chromatography column, IC SI-90 4E
Compared to chloride which is highly concentrated in sea water, concentration of nitrous acid is too low, and thus interfered by chloride ion peak to be monitored by a CD. Since nitrous, bromine, and nitrate ions have UV absorbance, they can be monitored by UV detector without being affected by chloride ion.
Sample : 100-fold diluted Sea water
(Water ),
20µL
1. F–
2. CI–
3. NO2–
4. Br–
5. NO3–
6. SO4–
Column : Shodex IC SI-90 4E (4.0mmID*250mm) Eluent : 1.8mM Na2CO3 + 1.7mM NaHCO3 aq. Flow rate : 1.0mL/min Detector : Suppressed conductivity, UV(210nm) Column temp. : 25°C