Polyphosphoric Acids (I-524A)
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 : 50?L
1. H2PO4– 20mg/L
2. H2P2O72- 50mg/L
3. H3P3O102- 50mg/L
Column : Shodex IC I-524A (4.6mmID*100mm) Eluent : 5mM Trimesic acid + 0.04mM EDTA-2Na Flow rate : 1.2mL/min Detector : Non-suppressed conductivity Column temp. : 40°C