Columns and Accessories > IC and RFIC Columns > Specialty Anion Columns > IonPac AS7 Anion-Exchange Column
 
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IonPac AS7 Anion-Exchange Column

The IonPac® AS7 is a high-capacity, high-efficiency, hydrophobic, anion-exchange column designed for the separation of a wide range of polyvalent anions, including polyphosphates, polyphosphonates, and other polyvalent complexing agents such as EDTA and NTA. The AS16 or AS20 columns are recommended for polyphosphates.

  • Use the AS7 column for polyphosphates, polyphosphonates, and chelating agents (EDTA and NTA) in complex sample matrices.
  • Determine cyanide and sulfide using amperometric detection in sodium hydroxide and wastewater samples.
  • Analyze for hexavalent chromium using postcolumn reaction and visible absorbance detection in environmental matrices, including wastewater, drinking water, and ambient air.
  • Separate inorganic and organic species of arsenic in drinking water and urine samples.

An acidic eluent (eliminating metal interferences during quantification) with postcolumn derivatization and UV-Vis absorbance detection is used to determine the polyvalent anions in complex matrices. The AS7 column can be used with a wide range of detectors including conductivity, amperometry, and photometry.

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

Order Information
IonPac AS7 Analytical Column (4 x 250 mm)035393
IonPac AG7 Guard Column (4 x 50 mm)035394
IonPac AS7 Analytical Column (2 x 250 mm)063097
IonPac AG7 Guard Column (2 x 50 mm)063099
Data Sheets
IonPac AS7 Anion Exchange Column Data Sheet   476K
AN 80: Determination of Dissolved Hexavalent Chromium in Drinking Water, Groundwater and Industrial Waste Water Effluents by Ion Chromatography   261K
AU 107: Determination of Cyanide in Strongly Alkaline Solutions   90K
AU 144: Determination of Hexavalent Chromium in Drinking Water Using Ion Chromatography   91K
TN 26: Determination of Cr(VI) in Water, Waste Water, and Solid Waste Extracts   124K
IonPac AS7 Analytical Column Manual   528K
IonPac® AS20 Column

The new IonPac AS20 is the recommended hydroxide-selective column for trace perchlorate in drinking water.

IonPac AS16 Column
The IonPac® AS16 column is designed for polarizable anions and trace perchlorate.
   
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