Operating in Neutralization Mode - ERD 500 - ERS 500e - ERS 500 Carbonate - DRS 600 - Operating in Neutralization Mode - ERD 500 - ERS 500e - ERS 500 Carbonate - DRS 600

For detailed operation of Dionex IC systems, consult the accompanying product manuals.

Neutralization pretreatment coupled with Ion Chromatography involves the following steps:

1. The concentrated sample is loaded into the sample loop of the “Sample Valve” with either a syringe or an Autosampler.
2. The sample loop is switched in-line and flushed with a stream of deionized water.
3. The deionized water pushes the sample through the Dionex DRS 600, where neutralization begins.
4. Common bases or acids that have been diluted fourfold or more can be completely neutralized after one pass through the Dionex DRS 600 at flow rates ≤ 0.5 mL/min.
5. After complete neutralization, the sample is delivered to the injection valve of the Dionex Ion Chromatography system and a low-pressure trap column such as the Dionex IonPac UTAC-XLP2 (Item # 072781) for the Dionex ADRS 600 (4 mm) or Dionex IonPac TCC-XLP1 (Item # 063889) for the Dionex CDRS 600 (4 mm).
6. The trace ions are then analyzed by the Dionex Ion Chromatography system.

For detailed information on the timing and configuration of the Sample Valve, and Injection Valve, refer to Thermo Scientific Dionex Application Note 93 or 94, or to the Dionex SP10 AutoNeutralizer Operator’s Manual (Document Number 034980).