Agilent 1290 Infinity Binary LC System with ISET – Emulation of a Waters Alliance 2695 LC Applying Concave, Convex, and Linear Gradients

Importance of the Topic

The ability to transfer chromatographic methods seamlessly between different HPLC systems is crucial for pharmaceutical, environmental, and industrial laboratories. Method transfer reduces development time and cost, ensures consistency with historical data, and supports regulatory compliance by maintaining comparable results across instruments.

Objectives and Study Overview

This technical overview evaluates the Agilent 1290 Infinity Binary LC System equipped with Intelligent System Emulation Technology (ISET) for its capability to emulate a Waters Alliance 2695 LC applying linear, concave, and convex gradients. The study compares chromatographic performance metrics—including retention time deviations and resolution—between the emulated and native platforms using a standard test mixture.

Methodology and Instrumentation

Chromatographic conditions were harmonized for both systems:

• Column: Agilent ZORBAX Eclipse Plus C18, 4.6×100 mm, 5 µm
• Temperature: 30 °C; injection volume: 3 µL at 10 °C
• Mobile phase A: water; B: acetonitrile; flow rate: 1.2 mL/min
• Gradient range: 10–90 % B using linear, concave, and convex profiles
• Detection: diode array at 245/10 nm, reference 400/100 nm, 10 Hz; data processed with OpenLAB CDS ChemStation Rev. C.01.05

Instrumentation used:

• Agilent 1290 Infinity Binary Pump with ISET (G4220A)
• Agilent 1290 Infinity Autosampler (G4226A)
• Agilent 1290 Infinity Thermostat and Column Compartment (G1330B, G1316C)
• Agilent 1290 Infinity Diode Array Detector (G4212A)
• Waters Alliance 2695 LC with Dual Absorbance Detector VWD 2487

Main Results and Discussion

Overlaid gradient profiles and normalized chromatograms demonstrated that the 1290 Infinity with ISET reproduced linear, concave, and convex gradients similar to the Waters system. Key findings:

• Retention time deviations without fine-tuning remained below 4.7 % for convex, 2.6 % for concave, and 2.2 % for linear gradients—well within the ±5 % acceptance criteria.
• Applying a 100 µL delay volume fine-tuning reduced convex gradient retention deviation to under 2.25 %.
• Resolution improved markedly on the 1290 Infinity system due to its reduced extra-column volume, lowering peak width and enhancing peak separation beyond the Waters system performance.

Benefits and Practical Applications

• Rapid method transfer across legacy and third-party LC instruments without revalidation.
• Preservation of existing method performance ensures continuity in quality control and research laboratories.
• Enhanced resolution and throughput enabled by advanced pump and detector design.

Future Trends and Applications

Emerging directions include:

• Integration of real-time emulation in automated workflows for high-throughput laboratories.
• Expansion of ISET to emulate additional third-party systems and complex gradient profiles.
• Machine-learning-driven parameter optimization to further minimize retention and resolution deviations.

Conclusion

The Agilent 1290 Infinity Binary LC System with ISET successfully emulates Waters Alliance 2695 gradients—concave, convex, and linear—with retention time deviations within required limits and superior resolution. This capability streamlines instrument upgrades, reduces method redevelopment, and maintains consistent analytical performance.

References

1. Agilent 1290 Infinity Binary LC and 1290 Infinity Quaternary LC with Intelligent System Emulation Technology, Agilent Technologies, publication 5991-3369EN, 2013.
2. Huesgen A.G., Seamless instrument-to-instrument method transfer from an Agilent 1100/1200 Series LC to an Agilent 1290 Infinity LC using ISET, Agilent Technologies Technical Overview 5990-9113EN, 2011.
3. Huesgen A.G., Agilent 1290 Infinity Binary LC with ISET – Emulation of the Waters Alliance 2695 LC system analyzing endocrine disruptors, Agilent Technologies Application Note 5991-1605EN, 2013.