Method Transfer from an Agilent 1200 Series LC to an Agilent 1260 Infinity II LC

Significance of the Topic

Instrument-to-instrument transfer ensures consistent analytical performance across different LC platforms. In pharmaceuticals and quality control laboratories, validated methods often require requalification when instruments are upgraded, and seamless transfers minimize downtime and regulatory burden.

Objectives and Study Overview

This study demonstrates the equivalency of a conventional LC assay for benzocaine lidocaine prilocaine and tetracaine when transferred from the Agilent 1200 Series Binary LC to the Agilent 1260 Infinity II LC. Additionally it explores method scaling to UHPLC on the 1260 Infinity II platform to improve resolution and reduce analysis time and solvent consumption.

Methodology

The conventional LC method employed a 4.6 × 150 mm 5 µm C18 column with a potassium phosphate buffer pH 8 and acetonitrile gradient over 24 minutes at 1.5 mL/min. UHPLC conditions were implemented with 2.7 µm Poroshell HPH-C18 columns of 4.6 × 100 mm and 3.0 × 50 mm using accelerated gradients and higher flow rates.

Instrumentation Used

• Agilent 1200 Series LC modules for method reference
• Agilent 1260 Infinity II LC with binary pump vialsampler with column compartment diode array detector and high-performance degasser
• OpenLAB CDS Version 2.1 for instrument control and data processing
• Agilent InfinityLab Poroshell HPH-C18 columns enabling UHPLC at up to 600 bar

Key Results and Discussion

• Direct transfer from the 1200 Series to the 1260 Infinity II LC yielded retention time deviations below 0.3% and equivalent resolution confirming method equivalency
• Scaling to UHPLC on a 4.6 × 100 mm 2.7 µm column reduced run time by 67% and solvent use by 33% while enhancing peak efficiency
• Fast UHPLC on a 3.0 × 50 mm 2.7 µm column cut analysis time by about 90% and solvent usage by over 85% with minor resolution trade-offs
• Retention time and peak area precision remained within 0.03% RSD for all analytes across platforms and conditions

Benefits and Practical Applications

• Regulatory compliance through validated method transfer without re-optimization
• Enhanced laboratory productivity via reduced analysis times
• Lower operating costs due to significant solvent savings
• Improved chromatographic performance with UHPLC supporting tighter QA/QC specifications

Future Trends and Opportunities

The integration of high-pressure UHPLC platforms with advanced data systems like OpenLAB CDS paves the way for automated high-throughput assays. Emerging column technologies and micro-flow regimes may further shrink cycle times and solvent footprints aligning with green analytical chemistry and real-time release testing strategies.

Conclusion

Seamless instrument-to-instrument transfer from Agilent 1200 Series to 1260 Infinity II LC was achieved with less than 0.3% retention time variation and comparable resolution. UHPLC adaptation on the 1260 Infinity II platform delivered marked reductions in run time and solvent consumption demonstrating robust efficient and scalable analysis of local anesthetics.

References

• Agilent 1290 Infinity with ISET Agilent Technologies User Manual part number G4220-90314 2015