Monovalent and Divalent Cation Standards (5) (YK-421) (Phosphoric Acid + 18-Crown 6-Ether Eluent)

With using IC YK-421, when Na + is contained so much in a sample, analysis of very small quantity of NH 4 + is difficult. Separation of Na + and NH 4 + is improved by adding 18-Crown 6-etherb in phosphate acid aqueous as eluent.


Sample : 20 μL
1. Li + 2 mg/L
2. Na + 10 mg/L
3. NH 4 + 10 mg/L
4. K + 20 mg/L
5. Mg 2+ 20 mg/L
6. Ca 2+ 10 mg/L

Column       : Shodex IC YK-421 (4.6 mm I.D. x 125 mm)
Eluent       : 4 mM H3PO4 +n mM 18-Crown 6-ether aq.
Flow rate    : 1.0 mL/min
Detector     : Non-suppressed conductivity
Column temp. : 40 °C

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