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Eluent Suppressors for Ion Chromatography

suppressors The Suppressor Advantage

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MicroMembrane™ Suppressors (MMS Dionex introduced suppression in 1975, thereby bringing ion chromatog- raphy (IC) to the forefront of modern analytical techniques for inorganic analysis. Suppression greatly enhances signal-to-noise ratio (see Figure 2) in two ways by:
™ III) are used for chemi-cally regenerated suppression of ion chromatography eluents requiring high capacity, solvents, and/or very low noise.

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The Anion Ion-Exclusion Suppressor (AMMS
®

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ICE II) is used for chemi-cally regenerated suppression of ion-exclusion chromatography. Decreasing background eluent conductivity and noise

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The Self-Regenerating Suppressor
® (SRS
® 300) is used for electrolytic-ally regenerated suppression of ion chromatography applications requir- ing high capacity, low noise, and fast start-up. SRS 300 suppressors are recommended for isocratic or gradient use with hydroxide eluents or methanesulfonic acid and sulfuric acid eluents. These suppressors are a fundamental component of a Reagent-Free™ IC (RFIC™) system.

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Increasing analyte conductivity compared with nonsuppressed IC Dionex offers four suppressors for continuous suppression of the eluent in a broad range of IC applications. Suppressor choice depends on the elu- ent used, whether organic solvents are used, analyte and matrix concentration, and the type of chromatography being practiced:

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The Atlas
® Electrolytic Suppres-sor (AES
® ) is recommended for isocratic anion-exchange separations with carbonate eluents, or isocratic cation-exchange separations with low concentrations of methanesulfo- nic acid or sulfuric acid eluents.

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