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Cation Analysis in the Presence of PEG (YS-50)

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Waste water from electronic production factories may contain hydrophilic polymers. As a waste water model, sample containing mono- and di-valent cations in the presence of polyethylene glycol (PEG2000) was prepared. Ion chromatography (cation) column, IC
YS-50was used under non-suppressor method. All cations analyzed showed good recovery without having any effect from polyethylene glycol. Some PEG2000 is adsorbed on the column, however this can be removed by adding 50% ACN in the eluent.

Sample : 10µL

Cation mixture in 5% PEG2000 solution

No.
cation
Recovery (%)
1. Li+ 2mg/L
106
2. Na+ 10mg/L
104
3. NH4+ 10mg/L
101
4. K+ 20mg/L
101
5. Mg2+ 10mg/L
99
6. Ca2+ 10mg/L
97




Column : Shodex IC YS-50 (4.6mmID*125mm)

Eluent : 4mM Methanesulfonic acid aq.aminomethane)

Flow rate : 1.0mL/min

Detector : Non-suppressed conductivity

Column temp. : 40°C