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IonPac CS16 Cation-Exchange Column

High-Capacity Carboxylate-Functionalized Column for Disparate Sodium and Ammonium Concentrations

The IonPac^? CS16 is the column of choice for disparate concentration ratios of adjacent eluting cations such as sodium and ammonium in diverse sample matrices. The high-capacity, high-resolution CS16 column can be used for short-chained amines, including alkylamines and alkanolamines, in diverse sample matrices. The CS16 column is now available in capillary format (0.5 × 250 mm) offering reduced eluent consumption and reduced operating costs.

For disparate concentration ratios of close-eluting cations such as ammonium and sodium in complex matrices
Ideal for trace-level ammonium in high concentrations of sodium
Ideal for trace-level sodium in high concentrations of ammonium or amines
Best carboxylate-functionalized column to tolerate samples with low pH
Isocratic acid eluent and elevated temperature (40 °C) required for sodium: ammonium ratios to 1:10,000
Gradient MSA eluent and elevated temperature required for sodium: ammonium ratios up to 1:20,000
Useful for short-chained amines, including alkylamines and alkanolamines
Compatible with organic solvents excluding alcohols

Using an isocratic acid eluent and elevated temperature (40 °C) coupled with suppressed conductivity, ratios up to 10,000:1 of sodium and ammonium can be resolved in less than 20 min. Sample matrices include environmental waters; power plant waters treated with ammonium, morpholine or ethanolamine; chemical additives; chemical process solutions; scrubber solutions; plating baths; and industrial solvents. The CS16 is designed for use in most IonPac CS15 applications.

The CS16 column has the highest capacity among Dionex carboxylate-based cation columns, resulting in improved loadability and resolution. Use the CS16 with the Eluent Generator for simplified, consistent methanesulfonic acid eluent preparation. Use the Cation Self-Regenerating Suppressor (CSRS^? 300) with standard or microbore CS16 columns or the Cation Capillary Electrolytic Suppressor (CCES^? 300) with the CS16 capillary column.

IonPac CS16 Cation-Exchange Column Specifications
Dimensions	IonPac^? CS16 Capillary Column: 0.5 × 250 mm IonPac CG16 Capillary Guard Column: 0.5 × 50 mm IonPac CS16 Analytical Column: 5 × 250 mm and 3 × 250 mm IonPac CG16 Guard Column: 5 × 50 mm and 3 × 50 mm
Maximum Operating Pressure	4000 psi (Standard and Microbore), 5000 psi (Capillary)
Phase Compatibility	Acidic eluents; 0–100% HPLC acetonitrile. Alcohols should be avoided.
Substrate Characteristics	Bead Diameter: 5 μm Cross-Linking (%DVB): 55%
Functional Group Characteristics	Ion-Exchange Groups: Grafted carboxylic acid Surface Characteristics: Medium hydrophobic
Capacity	84 μeq (0.5 × 250 mm capillary column) 17 μeq (0.5 × 50 mm capillary guard column) 8400 μeq (5 × 250 mm analytical column) 1700 μeq (5 × 50 mm guard column) 3000 μeq (3 × 250 mm analytical column) 600 μeq (3 × 50 mm guard column)
Column Construction	PEEK^? with 10-32 threaded ferrule-style end fittings. All components are nonmetallic.