The Atlas^® Electrolytic Suppressor (AES^®) is a continuous electrolytically regenerated suppressor based on the MonoDisc ^TM  and AutoSuppression^® devices developed by Dionex Corporation. The unique design of the Atlas allows for very fast start-up times and an extremely low noise level, especially for carbonate eluents. If you want to increase sample throughput and improve minimum detection limits, consider the AES device from the company that pioneered suppression science.

Benefits of the AES

• Superior performance with very low noise, background conductivity, and excellent baseline stability
• Easy to use maintenance-free operation
• Fast start-up and equilibration

The AES is a fifth-generation advancement in AutoSuppression devices, providing low noise, fast start-up, and ease of use. The AES is a new concept in continuous electrolytic eluent suppression for IC applications. The MonoDisc suppression bed of the AES is composed of ion-exchange monolith and flow distribution disks. This configuration facilitates efficient exchange of the eluent counter ions for regenerant ions, resulting in eluent suppression and analyte response enhancement. Atlas has much faster daily start-up times to improve the throughput of routine samples analysis.

The AES can be used for most IC applications, requiring either carbonate or methanesulfonic acid eluents and has a suppression capacity up to 25 mN at 1.0 mL/min. The AES has a low void volume of 35 µL, allowing use with 5-, 4-, 3-, and 2-mm i.d. column applications with minimal losses in peak efficiency for 2-mm operation. The AES offers improved performance in terms of lower baseline noise and faster start-up. Due to the improved baseline noise, method detection limits can be decreased by as much as threefold by using the AES. 

The Atlas routinely operates in recycle mode; however, external water mode is available for dual-detection applications such as postcolumn reactions.

Noise Levels

Each module in the IC system contributes to the chromatographic noise. To obtain the lowest possible noise levels, each module in the system must be operating at peak performance. Typical sources of bothersome noise include the pump, suppressor, and detector. The Atlas suppressor greatly reduces the noise generated from the suppressor, compared to the SRS performance. The MMS produces the least amount of noise because it uses nonelectrolytic chemical regeneration.

Low noise levels can translate into lower method detection limits; however, the results are very method dependant.

The Suppressor Cleanup Kit provides off-line cleanup of suppressors. The kit includes one 1-L plastic bottle, one pressure regulator (0–30 psi/210 kPa), one 2-way valve, and all of the tubing and fittings required for operation.

Suppressor Control/Requirements

The Atlas suppressor is fully compatible with all ICS ion chromatography systems, including ICS-2500, ICS-2000, ICS-1500, and ICS-1000. When ordering an Atlas suppressor for older systems, the DX-600, BioLC^®, or DX-320 systems must be configured with Chromeleon^®/PeakNet^® 6.2 or higher, and an ED50A, CD25A, or IC25A detector. The RFC-30 or RFC-10 Suppressor Controller must be ordered to use the Atlas with the DX-600, DX-500, or DX-320 systems configured with ED40, ED50, CD20, CD25, or IC25 detectors. The RFC-30 Controller (with adapter cable) or RFC-10 are also required for the DX-120.