For Separation of a Wide Range of Polyvalent Anions
The IonPac® AS7 separates a wide variety of polyvalent anions, including polyphosphates, polyphosphonates, and other polyvalent complexing agents such as EDTA and NTA using acidic eluent (eliminating metal interferences) with postcolumn derivatization and UV-Vis detection.
- For polyvalent anions and chelating agents in complex sample matrices
- Determines cyanide and sulfide using amperometric detection
- Useful for hexavalent chromium in environmental matrices
The AS7 column has a unique polymer packing that provides superior performance for separating ionic and polar compounds. The patented packing offers high speed, high efficiency, and high loading capacity at moderate backpressures.
Note: The newer IonPac AS16 or AS20 column is recommended for polyphosphates.
| IonPac AS7 Anion-Exchange Column Specifications |
|---|
| Maximum operating pressure | 4000 psi (26 MPa) |
| Mobile phase compatibility | pH 0–14 |
| Column construction | PEEK™ with internal style 10-32 threaded ferrule-style end fittings.
All components are nonmetallic. |
| Substrate characteristics | Particle Diameter: 10 µm
Cross-Linking (%DVB): 2% |
| Latex characteristics | Functional Group: Alkyl quaternary ammonium
Latex Cross-Linking: 5%
Latex Diameter: 530 nm
Capacity (µeq/column): 100 µeq (4 x 250 mm) and 25 µeq (2 x 250 mm) Hydrophobicity: Medium-high |
| Analytical column dimensions | IonPac® AS7 Column: 4 x 250 and 2 x 250 mm |
| Guard column dimensions | IonPac AG7 Column: 4 x 50 and 2 x 50 mm |
Determination of polyphosphonate scale inhibitors using the IonPac AS7 4 mm column.
Chelating agents by UV detection with postcolumn ferric nitrate.
Determination of cyanide and sulfide using the IonPac AS7 2 mm column with amperometric detection and a disposable silver electrode.
Determination of hexavalent chromium using the IonPac AS7 column.
Determination of cyanide and sulfide in sodium hydroxide and wastewater samples using the IonPac AS7 column.
| Analytical Columns |
|---|
| IonPac AS7 Analytical Column (4 x 250 mm) |
035393 |
| IonPac AS7 Analytical Column (2 x 250 mm) |
063097 |
| Guard Columns |
|---|
| IonPac AG7 Guard Column (4 x 50 mm) |
035394 |
| IonPac AG7 Guard Column (2 x 50 mm) |
063099 |
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