Dionex IonPac AS11 Gradient Analysis of 10% Sodium Hydroxide - ERD 500 - ERS 500e - ERS 500 Carbonate - DRS 600 - Dionex IonPac AS11 Gradient Analysis of 10% Sodium Hydroxide - ERD 500 - ERS 500e - ERS 500 Carbonate - DRS 600

Sample

100 µL of 10% NaOH neutralized in the SP10 AutoNeutralizer

Concentrator Column

Low-Pressure Trace Anion Concentrator (i.e., Dionex IonPac UTAC-XLP2, Item # 072781)

Trap Column

Anion Trap Column (i.e., Dionex IonPac ATC-HC 500, Item # 075978)

Guard Column

Dionex IonPac AG11 Guard Column

Analytical Column

Dionex IonPac AS11 Analytical Column

Eluents

E1: Type I Deionized Water

E2: 5.0 mM NaOH

E3: 100 mM NaOH

Eluent Flow Rate

2.0 mL/min (4-mm)

Electrolytic Suppressor

Dionex Anion Dynamically Regenerated Suppressor, Dionex ADRS 600

Recycled Eluent Mode

or Chemical Suppressor

Dionex Anion Chemically Regenerated Suppressor, Dionex ACRS 500

Chemical Regenerant

50 mN H₂SO₄

Expected Background Conductivity

0.5 mM NaOH: 1 µS

35 mM NaOH: 3.5 µS

Expected System Operating Back Pressure

Without Guard: 1,600 psi (11.03 MPa)

With Guard: 1,850 psi (12.75 MPa)