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Analysis of Pyrophosphate and Tripolyphosphate (NI-424)

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


Sample : 150mg/L each, 100μL
1. H2P2O72-
2. H3P3O102-
Column       : Shodex IC NI-424 (4.6mmI.D. x 100mm)
Eluent       : 8mM H2SO4 + 0.04mM EDTAE2Na aq.
Flow rate    : 1.0mL/min
Detector     : Shodex RI
Column temp. : 40°C