Phosphonates

1-Hydroxyethylidene-1,1-diphosphonate (HEDP), Nitrilotris(methylene phosphonate) (NTMP), N,N,N',N'-Ethylenediaminetetrakis(methylene phosphonate) (EDTMP) and Diethylenetriaminepenta(methylene phosphonate) (DTPMP) were analyzed using IC NI-424.



Sample : 100mg/L each, 100micro-L
1. 1-Hydroxyethylidene-1,1-diphosphonate, HEDP
2. Nitrilotris(methylene phosphonate), NTMP
3. N,N,N',N'-Ethylenediaminetetrakis(methylene phosphonate), EDTMP
4. Diethylenetriaminepenta(methylene phosphonate), DTPMP

Column       : Shodex IC NI-424 (4.6mmID*100mm)
Eluent       : 3mM H2SO4 aq.
Flow rate    : 1.0mL/min
Detector     : Shodex RI
Column temp. : 40deg-C