The Thermo Scientific Dionex IonPac®AS25 column is ideally suited for the analysis of multivalent anions and polarizable anions (iodide and perchlorate) including sulfur species (sulfite, sulfate, thiosulfate and thiocyanate) in complex sample matrices. The Dionex IonPac AS25 column simplifies the determination of polarizable anions, including thiosulfate, iodide, thiocyanate, and perchlorate by using an isocratic hydroxide eluent with no solvent required for the separation. However, for the best peak shape of polarizable anions, use the Thermo Scientific Dionex IonPac AS16 column or the Thermo Scientific Dionex IonPac AS20 column.
Separate hydrophobic anions (iodide, thiocyanate, and thiosulfate) in approximately 25 min without the use of solvent
Ideal for polyvalent anions, including polysulfates, polyphosphates and polycarboxylates
Analyze complex matrices including wastewater effluents from chemical industries, foods and beverages
Ultralow hydrophobicity allows fast analysis of polarizable anions
The Dionex IonPac AS25 is a high-capacity, hydroxide-selective column for the determination of multivalent anions and polarizable anions including sulfur species in complex sample matrices including wastewater effluents, scrubber solutions and food and beverage samples can be easily separated on the Dionex IonPacAS25 without the use of solvent. The Dionex IonPac AS25 column is available in 0.4 × 250 mm , 2 × 250 mm, 4 × 250 mm formats supporting flow rates from 0.010 to 3 mL/min.
| Thermo Scientific Dionex IonPac®AS25 Anion-Exchange Column Specifications | |
|---|---|
| Dimensions | Dionex IonPac AS25 Analytical Column: 2×250 mm and 4×250 mm Dionex IonPac AG25 Guard Column: 2×50 mm and 4×50 mm Dionex IonPac AS25 Capillary Column: 0.4 × 250 mm Dionex IonPac AG25 Capillary Guard Column: 0.4 × 50 mm |
| Maximum Operating Pressure | 4000 psi (microbore and standard bore) 5000 psi (capillary) |
| Mobile Phase Compatibility | pH 0–14; 0–100% HPLC solvents |
| Substrate Characteristics | Bead Diameter: 7.5 µm Pore Size: 2000 Å super macroporous resin Crosslinking (%DVB): 55% |
| Ion-Exchange Group | Functional Group: Alkanol quaternary ammonium ion Hydrophobicity: Ultralow |
| Capacity | 3.5 µeq (0.4 ×250 mm capillary column) 0.035 µeq* (0.4× 50 mm capillary guard column) 87.5 µeq (2×250 mm analytical column) 0.875 µeq* (2× 50 mm guard column) 350 µeq (4×250 mm analytical column) 3.5 µeq* (4×50 mm guard column) *Guards are packed with a low capacity microporous resin |
| Column Construction | PEEK™with 10-32 threaded ferrule style end fittings. All components are nonmetallic. |
Isocratic separation of sulfur species and inorganic anions using a sodium hydroxide eluent on the Thermo Scientific Dionex IonPac™AS25 column.
Gradient separation of common anions and polarizable anions using the Dionex IonPac AS25 column.
Separation of inorganic anions and polarizable anions using the Dionex IonPac AS25 capillary column.
Determination of sulfur species in wastewater using the Dionex IonPac AS25 column with a potassium hydroxide gradient delivered with an eluent generator.
Determination of sulfur species in an acid-gas scrubber solution using the Dionex IonPac AS25 column with a potassium hydroxide gradient delivered with an eluent generator.
Analysis of a simulated sample of volcanic gas condensate separated using the Dionex IonPac AS25 column.
| Analytical Columns | |
|---|---|
| IonPac AS25 Capillary Column (0.4 x 250 mm) | 076012 |
| IonPac AS25 Analytical Column (4 x 250 mm) | 076014 |
| IonPac AS25 Analytical Column (2 x 250 mm) | 076016 |
| Guard Columns | |
|---|---|
| IonPac AG25 Capillary Guard Column (0.4 x 50 mm) | 076013 |
| IonPac AG25 Guard Column (4 x 50 mm) | 076015 |
| IonPac AG25 Guard Column (2 x 50 mm) | 076017 |
