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