Analysis of Pyrophosphate and Tripolyphosphate (NI-424)

To separate pyrophosphate(H2P2O72-) and tripolyphosphate (H3P3O102-) by ionexchange, an acidic eluent where they have a low ionic value is employed.


Sample : 150 mg/L each, 100 μL
1. H2P2O72-
2. H3P3O102-


Column       : Shodex IC NI-424 (4.6 mm I.D. x 100 mm)
Eluent       : 8 mM H2SO4 + 0.04 mM EDTAE2Na aq.
Flow rate    : 1.0 mL/min
Detector     : RI
Column temp. : 40 °C

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