Sea Water (1) (I-524A)

Anions in sea water were analyzed using IC I-524A. Since sea water contains a considerable amount of chloride ion, the chlorine should be removed prior to analysis. Put Ag-type cation exchanger in a disposable syringe and pass the sea water through the syringe. After the pretreatment, other anions can be analyzed without the interference from chloride ion.

(Preparation of eluent)
(1) Put 0.415g of reagent grade phthalic acid and 0.278g of reagent grade tris(hydroxymethyl)aminomethane into a 1liter messflask.
(2) Dilute with purified water to make up a 1 liter solution.
(3) Dissolve using an ultrasonic vibrator.
(4) Pass through a 0.2microm membrane filter before use.

Sample : Sea water (Water)
1.F^–
2.SO₄^2-

 Column : Shodex IC I-524A (4.6mmID*100mm)
 Eluent : 2.5mM Phthalic acid(pH4.0 adjusted with Tris(hydroxymethyl)aminomethane)
 Flow rate : 1.2mL/min
 Detector : Shodex CD
 Column temp. : 40°C