Thermo Scientific Dionex IonPac AS18 IC Columns

Use these longer 250mm Thermo Scientific™ Dionex™ IonPac™ AS18 columns higher resolution separations of more complex sample matrices. Dionex IonPac AS18 columns are high capacity hydroxide-selective anion-exchange columns. They are the column of choice for monitoring inorganic anions in drinking water and wastewater samples for compliance with U.S. EPA Methods 300.0 (A) and 300.1. This column is also recommended when separating the common inorganic anions and low-molecular weight organic acids in diverse sample matrices including drinking water, wastewater, leachates, foods, beverages, pharmaceutical preparations, and scrubber solutions.

High Resolution of Complex Sample Matrices

• Longer 250mm Dionex IonPac AS18 hydroxide-selective columns provide higher resolution separations of more complex sample matrices
• Available in standard bore, microbore, and capillary formatsAnalysis of Common Inorganic Anions and Low Molecular Weight Organic

Acids in Diverse Matrices

• Compliance monitoring of common anions in drinking water as specified in U.S. EPA Method 300.0 (A)
• Determination of low levels of inorganic anions in complex matrices using large-loop injections
• Superior retention and quantification of fluoride, acetate, and formate
• Isocratic separation of common inorganic anions in 9 min in diverse matrices using a 250mm column
• Higher-capacity applications use 250mm columns allowing injection of more concentrated samples without overloading or peak broadening
• Compatible with organic solvents to enhance analyte solubility, modify column selectivity, or allow effective column cleanup

Recommended for Inorganic Anions in Diverse Sample Matrices

• Source water and drinking water, municipal and industrial wastewater
• Industrial cooling water, hazardous waste extracts and dump site leachates, acid rain
• Foods and beverages, anionic counterions in pharmaceutical preparations and synthetic peptides
• Polymers such as polyols and polysulfonates, scrubber solutions

Multiple 250mm Formats for Application Flexibility

Get higher resolution separations of more complex sample matrices using these longer 250mm analytical columns. Choose from standard bore, microbore, and capillary formats and use the corresponding guard column to protect and increase the life of your analytical column. Use the:

• 4x250mm standard bore column with the 4x50mm guard column
• 2x250mm microbore columns with the 2x50mm guard column
• 0.4x250mm capillary columns with the 0.4x50mm guard column

Capillary Columns Reduce Operating Costs from Lower Eluent Requirements

Capillary columns provide significantly reduced operating and waste disposal costs through eluent conservation. Packed with the same material, the Dionex IonPac AS18 capillary columns provide the same performance as the standard bore and microbore counterparts. Operating costs are reduced because the capillary system operates at only 1% of the eluent flow rate of the standard bore system. Capillary columns are used with the Thermo Scientific™ Dionex™ ICS-4000 and ICS-5000+ Capillary systems.

Get Faster, High-Resolution separations from Dionex IonPac AS18-Fast and Dionex IonPac AS18-4µm Columns

For faster runs on relatively clean matrices, refer to the shorter 150mm Dionex™ IonPac™ AS18-Fast Hydroxide-Selective Anion-Exchange Columns
For fastest, highest resolution separations, refer to the small particle Dionex™ IonPac™ AS18-4µm Hydroxide-Selective Anion-Exchange Columns. Use of 4µm columns requires a high-pressure IC system.

Specifications

• Anion Exchange Capacity: 285 μeq
• Crosslinking: 55% DVB
• Column Capacity: 285 μeq
• Column Chemistry: Hydroxide
• For Use With (Application): Anion Exchange
• Ion Exchange Group: Alkanol Quaternary Ammonium Ion
• Max. Pressure: 5000 psi (345 bar)
• Solvent Compatibility: pH 0 to 14, 0 to 100% HPLC Solvents
• Stationary phase: IonPac AS18
• Format: Standard Bore
• Packing Material: Ethylvinylbenzene/Divinylbenzene