ANIONS: Used with and without Chemical Suppression
Metrosep A Supp 4 – 250/4.0
The Metrosep A Supp 4 – 250/4.0 is an extremely robust column with very good separation properties. The separation phase is comprised of polyvinyl alcohol particles with quaternary ammonium groups and a diameter of 9 µm. This structure guarantees great stability and a greater tolerance to very small particles which could pass through the integrated filter plate. The Metrosep A Supp 4 – 250/4.0 has a medium ion exchange capacity; sulfate elutes after 12.5 minutes. The number of plates which can be achieved with this separation column is higher than those on the Metrosep Anion Dual 2 – 75/4.6. For 5 mg/L chloride, 5900 theoretical plates are calculated; for 10 mg/L sulfate, 5800 theoretical plates are calculated. The A Supp 4 – 250/4.0 is particularly suitable for all routine tasks in water analysis. Its universal applicability makes it the standard column for the Metrohm 881 Compact IC pro, 882 Compact IC plus and 883 Basic IC plus.
To protect the IC separation column – even though it is not particularly sensitive to contaminants – we recommend the use of the Metrosep A Supp 4/5 Guard/4.0 or the A Supp 4/5 S-Guard/4.0.