The Metrosep A Supp 21 columns, designed for hydroxide-based eluents, have a very high capacity and great separating efficiency.
Sharp peaks are guaranteed by the small particles (4.6 μm) made of hydrophilized polystyrene/divinylbenzene. With its excellent stability across temperature, pressure, and pH, the stationary phase is suitable for harsh operating conditions.
The shorter version, Metrosep A Supp 21 - 150/4.0, is ideal for determining standard anions (fluoride, chloride, nitrite, bromide, nitrate, sulfate, and phosphate) in all types of water samples at room temperature. Its separation efficiency exceeds that of the US EPA method 300.1 A and the DIN EN ISO 10304-1 standard.
The column's high capacity enables accurate measurement of anions at low μg/L levels, even in demanding sample matrices.
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Tech Specs
Source: Metrohm USA Inc.
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| Housing material |
PEEK |
| Carrier material |
Hydrophilized Polystyrene-divinylbenzene copolymer with quaternary ammonium groups |
| Particle size |
4.6 µm (mono dispersive) |
| Standard flow |
0.8 mL/min |
| Maximum pressure |
21 MPa |
| Maximum flow |
1.4 mL/min |
| pH range |
0 - 14 |
| Column dimensions |
150 x 4.0 mm |
| Temperature range |
10 - 70 °C |
| Standard temperature |
25 °C |