Dionex™ IonPac™ AS23-4μm Analytical and Guard Columns (Thermo Scientific™)

Analyze trace bromate and other oxyhalides in drinking water, ground water, wastewater, and other diverse matrices using the Thermo Scientific™ Dionex™ IonPac™ AS23-4μm columns. The high capacity and selectivity of this column facilitates the determination of trace bromate at low-μg/L levels in the presence of high amounts of chloride, sulfate, and carbonate. Compared to Dionex IonPac AS23 column, the new Dionex IonPac AS23-4μm columns use smaller resin particles for more efficient separations resulting in more accurate peak integration and more reliable results.

Key Features

Compared to the Thermo Scientific™ Dionex™ IonPac™ AS23 columns, these columns use smaller resin particles for more efficient separations resulting in more accurate peak integration and more reliable results.

Designed Specifically for Trace Bromate Analysis in Drinking Water

Use the Dionex IonPac AS23-4μm for diverse matrices including drinking water, ground water, and waste water.
High capacity allows routine drinking water analysis without sample pretreatment or preconcentration.
Improved efficiencies and resolution compared to the Dionex IonPac AS23 column.
Easily transfer applications from the Dionex IonPac AS23 column to the AS23-4μm column due to the similar selectivity.
Compatible with organic solvents to enhance analyte solubility, modify column selectivity, and facilitate effective column clean-up.

Use With a High-Pressure IC System

Higher resolution is achieved through the use of smaller resin particles, which produce a column backpressure over 3000psi at the standard flow rates. A high-pressure IC system, such as the Thermo Scientific™ Dionex™ ICS-5000⁺ HPIC™ or the Thermo Scientific™ Dionex™ Integrion™ HPIC™ system is required to operate this column under standard conditions and take advantage of elevated flow rates and faster run times.

Multiple Formats Available

4x250mm and 2x250mm analytical columns
4x50mm and 2x50mm guard columns

Note: Use the Dionex AS23 Eluent Concentrate for simple, accurate eluent preparation.

Order Codes

Code	Description
302558	Catalog Number: 302558 Unit Size: Each 1 Diameter (Metric): 2 mm Length (Metric): 50 mm Particle Size: 11 μm For Use With (Equipment): Dionex IonPac AS23-4μm Microbore Analytical Column
302555	Catalog Number: 302555 Unit Size: Each 1 Diameter (Metric): 4 mm Length (Metric): 250 mm Particle Size: 4 μm For Use With (Equipment): Dionex IonPac AG23-4μm Standard Bore Guard Column
302556	Catalog Number: 302556 Unit Size: Each 1 Diameter (Metric): 4 mm Length (Metric): 50 mm Particle Size: 11 μm For Use With (Equipment): Dionex IonPac AS23-4μm Standard Bore Analytical Column
302557	Catalog Number: 302557 Unit Size: Each 1 Diameter (Metric): 2 mm Length (Metric): 250 mm Particle Size: 4 μm For Use With (Equipment): Dionex IonPac AG23-4μm Microbore Guard Column