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Calibration Curves for Low Concentration F –

IC NI-424 permits measurement of fluoride ion on the order of micro-g/L in analyzing ultra pure water by the direct injection method specified in JIS(Japanese Industrial Standard) K 0556.

Sample : 1mL

Column : Shodex IC NI-424 (4.6mmID*100mm)
Eluent : *18mM 4-Hydroxybenzoic acid + 2.8mM Bis-Tris
+ 2mM Phenylboronic acid + 0.005mM *2CyDTA(pH4.2)

Flow rate : 1.0mL/min
Detector : Shodex CD
Column temp. : 40°C

*1 The prescribed pH can be obtained by mixing the reagents in the composition described here.
*2 CyDTA: trans-1,2-Diaminocyclohexane-N,N,N’,N’-tetraacetic acid