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

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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-, HPO42-, SO42-.


Sample : 20μL
1. F- (2mg/L)
2. Cl- (3mg/L)
3. NO2- (5mg/L)
4. Br- (10mg/L)
5. NO3- (10mg/L)
6. HCO3- (300mg/L)
7. HPO42- (15mg/L)
8. SO42- (15mg/L)

(How to prepare the eluent)
(1) Put 19.08g of reagent grade Na2CO3 and 14.28g of reagent grade NaHCO3 into a 1 liter volumetric flask.
(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 0.45μm membrane filter before use.

Column       : Shodex IC SI-90 4E (4.0mmI.D. x 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. (25°C)