For Separation of a Wide Range of Polyvalent Anions
The IonPac? AS7 separates a wide variety of polyvalent anions, including polyphosphates, polyphosphonates, and other polyvalent complexing agents such as EDTA and NTA using acidic eluent (eliminating metal interferences) with postcolumn derivatization and UV-Vis detection.
For polyvalent anions and chelating agents in complex sample matrices
Determines cyanide and sulfide using amperometric detection
Useful for hexavalent chromium in environmental matrices
The AS7 column has a unique polymer packing that provides superior performance for separating ionic and polar compounds. The patented packing offers high speed, high efficiency, and high loading capacity at moderate backpressures.
Note: The newer IonPac AS16 or AS20 column is recommended for polyphosphates.
IonPac AS7 Anion-Exchange Column Specifications
Maximum operating pressure
4000 psi (26 MPa)
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 ?m Cross-Linking (%DVB): 2%
Latex characteristics
Functional Group: Alkyl quaternary ammonium Latex Cross-Linking: 5% Latex Diameter: 530 nm Capacity (?eq/column): 100 ?eq (4 x 250 mm) and 25 ?eq (2 x 250 mm) Hydrophobicity: Medium-high