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(H₂P₂O₇^2-) and tripolyphosphoric acid(H₃P₃O₁₀^2-). EDTA-2Na is added to prevent the complexation of ferrous ion with polyphosphoric acids.

Sample :
1. H₂PO₄^-
2. H₂P₂O₇^2-
3. H₃P₃O₁₀^2-

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