Anion Standards (19) (SI-90 4E)

Please use this column with suppressor type ion chromatography system.

Anion standards were analyzed using IC SI-90 4E (a column for anions analysis). For general purpose, it is recommended to use 1.8mM Na₂CO₃ + 1.7mM NaHCO₃ as the eluent. This eluent is best suited to the separation of typical 7 anions, F^-,Cl^-,NO₂^-,Br^-,NO₃^-,PO₄^3-,SO₄^2-. Using the flow rate of 1.5 mL/min, seven anions can be analyzed within ten minutes. Use the column temperature of 25deg-C.



Sample : 20micro-L
1. F^- (2ppm), 2. Cl^- (3ppm), 3. NO₂^- (5ppm), 4. Br^- (10ppm)
5. NO₃^- (10ppm), 6. HCO₃^- (300ppm), 7. PO₄^3- (15ppm), 8. SO₄^2- (15ppm)

(How to prepare the eluent)
(1) Put 19.08g of reagent grade Na₂CO₃ and 14.28g of reagent grade NaHCO₃ into a 1 liter messflask.
(2) Dilute with purified water to make up a 1 liter solution.
(3) Dissolve the solution using an ultrasonic vibrator. When the solution volume decrease after the vibration, add pure water to make up exact 1 liter solution. This is the concentrated solution and can be stored for half year in a refregirator with stopper.
(4) When making the eluent, take 10ml of the concentrated solution and dilute with purified water to make up 1 liter solution. Pass the eluent through a 0.45micron membrane filter before use.

Column       : Shodex IC SI-90 4E (4.0mmID*250mm)
Eluent       : 1.8mM Na2CO3+ 1.7mM NaHCO3 aq.
Flow rate    : 1.0mL/min or 1.5mL/min
Detector     : Suppressed conductivity
Column temp. : Room temp. (25deg-C)