Fast screening of mobile and stationary phases with the Agilent 1290 Infinity LC and seamless method transfer to an Agilent 1200 Series LC using ISET

Importance of the topic

In pharmaceutical quality assurance and control laboratories, rapid and reliable chromatographic method development is critical for the analysis of drug substances and their degradation products. While ultra-high-performance liquid chromatography (UHPLC) offers efficient separations and reduced solvent consumption, many QA/QC labs rely on conventional high-performance LC systems with pressure limits below those of UHPLC. A practical solution to this challenge is to use advanced method development tools on UHPLC systems and then transfer the optimized methods seamlessly to standard HPLC platforms.

Objectives and study overview

This work demonstrates a streamlined workflow for fast screening of stationary and mobile phases on the Agilent 1290 Infinity LC System using the Method Development Solution and the Method Scouting Wizard, followed by method translation to an Agilent 1200 Series Binary LC via Agilent Intelligent System Emulation Technology (ISET). The case study focuses on the separation of degradation products of metoprolol, a pharmaceutical compound, under various pH and phase conditions.

Methodology and instrumentation

The overall workflow comprised four main stages:

• Fast method scouting on Agilent 1290 Infinity LC with 2.1×50 mm, 1.8 µm ZORBAX RRHT columns (SB-C8, SB-CN, SB-Phenyl, Extend-C18, SB-C18), scanning pH 2.1–11 mobile phases and a 5 min gradient.
• UHPLC-to-HPLC method transfer using the Agilent Method Translator and Cost Savings Calculator to adapt from 2.1 mm × 50 mm columns to 4.6 mm × 150 mm, 5 µm columns.
• Fine tuning of the conventional method by evaluating additional gradients and column temperatures within the Method Scouting Wizard.
• Simulation of the Agilent 1200 Series LC on the 1290 Infinity LC via ISET to account for differences in system delay volume and mixing behavior, then final verification on the physical 1200 Series system.

Instrumentation

Agilent 1290 Infinity LC System components:

• Binary pump (G4220A), autosampler (G4226A) with cooler (G1330B), column compartment (G1316C), degasser, diode array detector (G4212A), Method Development Valve Kit (G4230B), solvent selection valves (G1160A)

Agilent 1200 Series Binary LC components:

• Binary pump (G1312A), autosampler (G1329A), column compartment (G1316A), degasser (G1322A), diode array detector (G1315B)

Software tools:

• Agilent OpenLAB CDS ChemStation Edition C.01.04
• Agilent Method Scouting Wizard A.02.02

Main results and discussion

• Screening identified SB-C18 at pH 2.1 (0.1% TFA) as the optimum phase, delivering the best peak shape and maximum number of resolved degradation products.
• UHPLC scouting (42 sample runs, 31 equilibration lines) completed in 13 h 50 min with two injections per phase/pH combination, reducing solvent usage significantly compared to conventional approaches.
• Method translation to 4.6×150 mm, 5 µm column via the Method Translator adjusted flow (0.25 mL/min to 1.2 mL/min), gradient length (5 min to 15 min), and injection volume (0.3 µL to 3 µL).
• Fine tuning evaluated three gradient profiles and two temperatures (40 °C, 50 °C); a 15 min gradient at 40 °C provided optimal resolution and run time.
• ISET simulation on the 1290 Infinity LC reproduced the retention times and chromatographic profiles of the 1200 Series LC within 1.5% retention time deviation and 3% resolution deviation across seven degradation peaks, ensuring accurate method transfer.

Benefits and practical applications

• Substantial time savings: complete development and transfer achieved in two days.
• Reduced solvent consumption and method development costs.
• Seamless transition from UHPLC to HPLC without manual re-optimization.
• Improved confidence in method reproducibility across different LC platforms.

Future trends and applications

Integration of intelligent software and simulation tools will continue to streamline chromatographic method development. Future enhancements may include machine learning-driven phase selection, real-time optimization of gradient profiles, broader emulation of diverse LC systems, and application to green chromatography using eco-friendly solvents.

Conclusion

The combined use of the Agilent 1290 Infinity Method Development Solution, Method Scouting Wizard, Method Translator, and ISET enables rapid UHPLC method development and reliable transfer to conventional HPLC systems. This approach minimizes development time, solvent use, and ensures consistent performance across different LC platforms. Results demonstrated less than 1.5% deviation in retention times and under 3% in resolution when transferring to the Agilent 1200 Series LC, validating the effectiveness of the ISET tool.