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Metrosep A Supp 10In focus: the new Metrosep A Supp 10 IC anion columnWith the Metrosep A Supp 10, Metrohm presents a favorably-priced anion columnthat is not only suitable for the determination of the standard anions, but also forcomplex applications. The straightforward separation of sulfite and sulfate is just oneexample of the wide range of uses of this new IC column. An additional advantage ofthe Metrosep A Supp 10 is the position and small size of the system peak (carbonate),which appears clearly before the chloride peak and therefore does not interferewith the determination (see the following two chromatograms).The separation of sulfite and sulfate can be achieved evenwith the 50 mm version of the Metrosep A Supp 10.Separation column: Metrosep A Supp 10 – 50(6.1020.050)Eluent: 5.0 mmol/L Na 2CO 3,5.0 mmol/L NaHCO 3Flow rate:1.0 mL/minTemperature: 45 °CPosition of the system peak using a carbonate/hydrogencarbonate eluent.Separation column: Metrosep A Supp 10 – 100(6.1020.010)Eluent: 5.0 mmol/L Na 2CO 3,5.0 mmol/L NaHCO 3Flow rate:1.0 mL/minTemperature: 45 °CThe new Metrosep A Supp 10 is based on a high-capacity styrene/divinylbenzenecopolymer with a particle size of only 4.6 µm. Metrohm has developed and optimizedthis well-proven column design even further. The result is an extremely robustanion column with excellent separation performance and adjustable selectivity.In chromatographic work the selectivity of the column with respect to the substancesto be determined is of great importance, particularly when separating componentswith very similar properties. In contrast to HPLC, for example, in ion chroma-14 Metrohm Information Issue 2/2005