Agilent 1260 Infinity Isocratic Pump (Specifications)

Significance of the Topic

The development of stable, pulse-free solvent delivery systems is critical for high-performance liquid chromatography (HPLC) applications in quality assurance, research and routine analysis. Precise flow control and high pressure capability enable the use of modern columns with small particle sizes, improving resolution and throughput. Reliable instrumentation reduces downtime and maintenance costs, offering robust performance for demanding workflows.

Objectives and Overview

This summary describes the design, specifications and practical benefits of the Agilent 1260 Infinity Isocratic Pump (G1310B). The goal is to highlight its operating principles, performance metrics, maintenance features and suitability for various chromatographic techniques, including size-exclusion (GPC/SEC) and analytical preparations.

Methodology and Instrumentation

The Agilent 1260 Infinity Isocratic Pump employs a dual-floating-piston hydraulic system with a servo-controlled variable-stroke drive. Key design aspects include:

• Dual pistons in series to ensure virtually pulse-free solvent flow
• Variable stroke volume automatically adjusted to the selected flow rate
• High-pressure capability up to 600 bar (60 MPa) at flow rates up to 5 mL/min, and up to 200 bar (20 MPa) at 10 mL/min
• User-selectable compressibility compensation for different mobile phase viscosities
• Materials resistant to harsh solvents and high salt concentrations, including stainless steel, PEEK, titanium and ceramics
• Local control via Agilent Instant Pilot and remote operation through CAN, RS-232 or optional LAN interface

Main Performance Characteristics and Discussion

Key performance metrics of the 1260 Infinity Isocratic Pump include:

• Flow range from 0.2 to 10 mL/min with setpoints adjustable in 0.001 mL/min increments
• Flow precision ≤ 0.07 % RSD (retention time) and accuracy of ± 1 % or 10 µL/min, whichever is larger
• Pressure pulsation below 2 % amplitude (typically < 1.3 %) at 1 mL/min isopropanol
• Early maintenance feedback to track seal wear and total pumped volume

These characteristics ensure reproducible retention times and low baseline noise, vital for high‐precision separations and long sequence runs.

Benefits and Practical Applications

Advantages of this pump system include:

• Enhanced resolution on modern small-particle columns thanks to 600 bar pressure capability
• Broad flow range covering both analytical and semi-preparative needs
• Minimal downtime via front-accessible maintenance parts and optional seal wash for high-salt phases
• Future‐proof design upgradeable to a quaternary pump configuration

Typical applications span pharmaceutical QA/QC, polymer GPC/SEC, environmental analysis and preparative separations.

Future Trends and Applications

Advances in chromatographic technology and software integration will likely drive:

• Automated gradient control through quaternary upgrades and direct coupling with mass spectrometry
• Expanded use of high-viscosity and green solvents requiring robust pressure compensation
• Enhanced remote diagnostics and predictive maintenance via IoT connectivity
• Modular designs for multi-dimensional and high-throughput screening platforms

Conclusion

The Agilent 1260 Infinity Isocratic Pump offers a balance of high pressure, precise flow control and low maintenance, making it well suited for demanding HPLC workflows. Its robust design and upgrade paths ensure long-term applicability in both routine and advanced analytical settings.

References

• No external references provided.