Agilent 7100 Capillary Electrophoresis System in Chromeleon 7

Importance of Topic

Capillary electrophoresis (CE) has emerged as a powerful separation technique in analytical chemistry due to its high resolution, minimal sample consumption and broad applicability to charged species. Integration of CE systems with modern chromatography data systems (CDS) streamlines method development, sequence management and data processing, making CE a routine tool in pharmaceutical, biotech and quality control laboratories. The ability to control CE hardware directly through software further enhances reproducibility and throughput.

Objectives and Overview of Technical Note

This technical guide explains how to configure and operate the Agilent 7100 Capillary Electrophoresis System within Thermo Scientific Chromeleon 7.2 and higher environments. It covers instrument setup, driver installation, method creation, sequence execution and advanced functions such as buffer replenishment, indirect detection and external pressure control. Compatibility requirements and unsupported features are summarized to help users implement CE workflows with confidence.

Instrumentation and Methodology

The Agilent 7100 CE System communicates via LAN and comprises:

• G7150A CE Mainframe
• G7151A Diode Array Detector (DAD) with RFID-enabled UV lamp (firmware ≥B.06.73)

Configuration steps include:

1. Physical setup and LAN connection to the control PC.
2. Verification of the Agilent LC Driver in Windows Programs & Features.
3. Instrument registration in Chromeleon’s Instrument Configuration Manager (specifying IP address and module auto-configuration).
4. Signal mapping verification in the 2D Signals tab.

Method development uses the Chromeleon Instrument Method Editor:

• Define run time and diagnostic channels.
• Set CE parameters: cassette temperature, applied voltage, stop time, injection sequence, capillary pre- and post-conditioning.
• Configure DAD wavelengths, bandwidths and timetable entries for balance or spectral acquisition.

Sequence editing allows multiple injections, method selection, processing and reporting templates. Injection volumes are nominal entries in the sequence table; actual injection is controlled by pressure×time or voltage×time.

Main Results and Discussion

Direct control of the CE system is available through the ePanel Status Dashboard. Users can perform immediate actions such as lamp on/off, bottle changes, capillary flushing, pressure or voltage application without altering saved instrument methods. The online plot displays live detector and diagnostic signals; baseline monitoring can be activated outside of runs.

Buffer replenishment and conditioning steps are integral method elements and can be executed in serial or parallel modes, improving throughput by overlapping pre- or post-conditioning with buffer exchange. Indirect photometric detection of non-UV-absorbing analytes employs high-absorbance background electrolytes and inverted wavelength assignments to yield positive peaks.

For high-viscosity media or capillary electrochromatography (CEC), external gas pressure (2–12 bar) can be configured in the Reconfigure Modules tab. The method interface adds pressure setpoints for preconditioning, injection, timetable and post-conditioning to ensure rapid capillary filling and prevent bubble formation.

Known limitations include lack of a capillary catalog, sample diagram, vial table and certain calibration curve types (cIEF or mobility correction). PSI units are not fully supported and must be avoided.

Benefits and Practical Applications

Seamless integration of the Agilent 7100 CE with Chromeleon enhances method reproducibility, data integrity and operational efficiency. High injection precision (<0.5 % RSD) and flexible direct or indirect detection modes make the system suitable for routine anion/cation analyses, isoelectric focusing, micellar electrokinetic chromatography and CEC. Automated buffer management reduces manual interventions and downtime.

Future Trends and Potential Applications

Advances in 3D spectral acquisition, tighter integration with LC-MS platforms and cloud-based instrument monitoring promise further improvements in CE workflows. Machine-learning-driven method optimization and predictive maintenance features are expected to accelerate adoption of CE in high-throughput and regulated environments.

Conclusion

This guide demonstrates a comprehensive workflow for deploying the Agilent 7100 CE System in Chromeleon 7. By following configuration best practices and leveraging advanced features such as indirect detection and external pressure, laboratories can achieve robust separations, high reproducibility and streamlined data handling.

Reference

• Agilent 7100 Capillary Electrophoresis System User Manual, Rev. B (2018)
• Thermo Scientific Chromeleon 7 Software Online Help
• Agilent Firmware Compatibility Guide (Document ID 69761)