Anions in Wastewater Using the Eco IC

The Eco IC, an entry-level ion chromatograph, has been designed for routine water analysis. Featuring a conductivity detector, the instrument can be used either with or without chemical suppression.

Here, the Metrosep A Supp 17 - 250/4.0 column is used to determine anions in wastewater. This type of column is suitable for water analysis at ambient temperatures.



Anion Conc. [mg/L]
1 Fluoride n.q.
2 Chloride 102.7
3 Nitrite n.q.
4 System peak (carbonate) -
5 Bromide n.q.
6 Nitrate 21.5
7 Sulfate 29.7
8 Phosphate n.q.




Sample Preparation

Metrohm Inline Ultrafiltration


. .
Metrosep A Supp 17 - 250/4.0 6.01032.430
Metrosep A Supp 17 Guard/4.0 6.01032.500



Eluent 5.0 mmol/L sodium carbonate;
0.2 mmol/L sodium hydrogen carbonate
Suppressor regenerant 100 mmol/L sulfuric acid
Rinsing solution STREAM



Detection of conductivity after chemical suppression


Eco IC 2.925.0020
863 Compact IC Autosampler 2.863.0010
IC equipment: Inline Ultrafiltration 6.5330.110



Flow rate 0.6 mL/minutes
Injection volume 10 µL
Pmax 18 MPa
Recording time 34 minutes
Column temperature Ambient


This information has been sourced, reviewed and adapted from materials provided by Metrohm AG.

For more information on this source, please visit Metrohm AG.


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