Anion Standards (9) (Polyphosphoric Acids)

Anion standards were analyzed using IC I-524A. This eluent is suited to the separation of three kinds of acids, phosphoric acid(H2PO4-), pyrophosphoric acid(H2P2O72-) and tripolyphosphoric acid(H3P3O102-). EDTA-2Na is added to prevent the complexation of ferrous ion with polyphosphoric acids.


Sample :
1. H2PO4-
2. H2P2O72-
3. H3P3O102-

Column       : Shodex IC I-524A (4.6mmID*100mm)
Eluent       : 3mM Trimesic acid + 0.04mM EDTA-2Na(pH3.3)
Flow rate    : 1.2mL/min
Detector     : Non-suppressed coductivity
Column temp. : 40deg-C