Cation Analysis in the Presence of PEG (YS-50)
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, ICYS-50 was 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 :10micro-L
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. Flow rate : 1.0mL/min Detector : Non-suppressed conductivity Column temp. : 40deg-C