For Separation of Haloacetic Acids and Bromate in Drinking Water Using Two-Dimensional Ion Chromatography (2D-IC) Analysis
The Thermo Scientific Dionex IonPac* AS26 hydroxide-selective anion-exchange column is specifically designed for 2D-IC separation of haloacetic acids (HAAs) in drinking water. The capacity and selectivity of this column enables analysis of haloacetic acids in drinking water at low-μg/L concentrations. The Dionex IonPac AS26 column is available in standard bore (4 × 250 mm), microbore (2 × 250 mm), and capillary (0.4 × 250 mm) formats, supporting flow rates from 10 µL/min to 3 mL/min.
- High capacity: 250 μeq per column (4 × 250 mm)
- Determines HAAs in high-ionic-strength matrices without sample pretreatment
- Column selectivity optimized for a 15 ºC operating temperature
- Compatible with HPLC organic solvents
- Used as second-dimension column in 2D-IC method for HAAs (0.4 × 250 mm)
| Dionex IonPac® AS26 Anion Exchange Column Specifications |
|---|
| Substrate Characteristics: | Bead Diameter and Pore Size:
7.5 µm (2 × 250, 4 × 250, and 0.4 × 250 mm);
supermacroporous resin (2000 Å)
13 µm (2 × 50, 4 × 50, 0.4 × 50 mm);
microporous resin (<10 Å)
Crosslinking (%DVB): 55% |
| Ion-Exchange Group: | Functional Group: Alkanol quaternary ammonium ion |
| Functional Group Characteristics: | Ultralow Hydrophobicity |
| Capacity: | 250 µeq (4 × 250 mm analytical column)
6 µeq* (4 × 50 mm guard column)
62.5 µeq (2 × 250 mm analytical column)
1.5 µeq* (2 × 50 mm guard column)
2.5 µeq (0.4 × 250 mm capillary column)
0.06 µeq* (0.4 × 50 mm capillary guard column)
*Guard is packed with a low-capacity microporous resin. |
| Column Construction: | PEEK™ with 10-32 threaded ferrule-style end fittings.
All components are nonmetallic. |
| Dimensions: | Dionex IonPac AS26 Analytical Column:
2 × 250 mm, 4 × 250 mm
Dionex IonPac AG26 Guard Column:
2 × 50 mm, 4 × 50 mm
Dionex IonPac AS26 Capillary Column:
0.4 × 250 mm
Dionex IonPac AG26 Capillary Guard Column:
0.4 × 50 mm |
| Maximum Operating Pressure: | 3000 psi (standard, microbore and capillary)
|
| Mobile Phase Compatibility: | pH 0–14; 0–100% HPLC solvents |
Determination of haloacetic acids using the IonPac AS26 column with two-dimensional ion chromatography analysis.
Gradient separation of HAA Anions using the Dionex IonPac AS26 Column
Separation of oxyhalides and inorganic anions using the Dionex IonPac AS26 with an hydroxide gradient.
Analysis of drinking water using the Dionex IonPac AS26 column.
The effect of temperature on selectivity using the Dionex IonPac AS26 column.
| Analytical Columns |
|---|
| IonPac AS26 Capillary Column (0.4 x 250 mm) |
076018 |
| IonPac AS26 Analytical Column (4 x 250 mm) |
076020 |
| IonPac AS26 Analytical Column (2 x 250 mm) |
076022 |
| Guard Columns |
|---|
| IonPac AG26 Capillary Guard Column (0.4 x 50 mm) |
076019 |
| IonPac AG26 Guard Column (4 x 50 mm) |
076021 |
| IonPac AG26 Guard Column (2 x 50 mm) |
076023 |
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