Anion Standards (6) (I-524A)

Anion standards were analyzed using IC I-524A. By adding boric acid to the phthalic acid, phosphoric ion (H₂PO^4-) and fluoride ion (F^-) can be separated.

(Preparation of eluent)
Put 0.332g of reagent grade phthalic acid, 0.223g of reagent grade tris(hydroxymethyl)aminomethane and 18.5g of boric acid into a i liter messflask and dilute with pure water to make up a 1 liter solution and dissolve it by stirring and warming.

This method is patented in Japan by Shimadzu Corporation.


Sample :
1. H₂PO₄^-
2. F^-
3. Cl^-
4. NO₂^-
5. Br^-
6. NO₃^-
7. SO₄^2-

Column       : Shodex IC I-524A (4.6mmID*100mm)
Eluent       : 2.0mM Phthalic acid + 1.84mM Tris(hydroxymethyl)aminomethane + 
               300mM Boric acid(pH4.0)
Flow rate    : 1.2mL/min
Detector     : Shodex CD
Column temp. : 40°C