IonPac AS21

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The AS21 hydroxide-selective anion-exchange column is specifically designed for determination of trace perchlorate in drinking water prior to MS/MS detection. The capacity and selectivity enable fast analysis of perchlorate at low μg/L concentrations. The AS21 is the specified column in US EPA Method 331.0.

Fast separation of perchlorate prior to MS/MS detection
Optimized for methylamine or hydroxide mobile phases
Specified column for US EPA Method 331.0
Optimum capacity: 45 μeq per column (2 × 250 mm)
Operates at ambient or elevated temperatures
Compatible with organic solvents

The AS21 2 × 250 mm column format was specifically developed for MS/MS compatibility to allow use of volatile mobile phases such as methylamine.

Specification Compare to others

Vendor Dionex Poresize, Ã… 2000

Brand IonPac AS21 pH stability 0.0 - 14.0

Mode Anion-Exchange Max pressure, psi / bar 3000 / 207

Modification Quaternary ammonium Surface area, m²/g N/A

Internal diameter, mm 2.0 Carbon load, % N/A

Length, mm 250 Operating temperature N/A

Particle size, µm 7.0 Endcapped N/A

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