Method Transfer from Agilent 1100 Series LC System to the ACQUITY UPLC H-Class System: The Effect of Temperature

Importance of the Topic

Analytical laboratories frequently face the challenge of transferring high-performance liquid chromatography (HPLC) methods across systems from different manufacturers. Temperature control plays a critical role in separation selectivity and retention, and differences in heating mechanisms can compromise method fidelity. Addressing temperature effects during transfer reduces redevelopment costs and downtime.

Study Aims and Overview

This study demonstrates successful transfer of an analgesic separation method from an Agilent 1100 Series LC System to a Waters ACQUITY UPLC H-Class System (CH-A compartment). The objective was to evaluate retention time comparability and selectivity over 36–60 °C, both with and without mobile phase pre-heating.

Methodology and Instrumentation

The transfer protocol involved measuring dwell volumes on each system and entering gradient delay via SmartStart Technology on the UPLC. Analyses were conducted at temperature intervals between 36 °C and 60 °C. Two configurations were tested: one employing mobile phase pre-heating and another bypassing pre-heating circuitry.

Used Instrumentation

• Agilent 1100 Series LC System with passive 3 µL pre-heater
• Waters ACQUITY UPLC H-Class System with active column compartment pre-heater and SmartStart gradient delay
• Identical analytical column chemistry and mobile phase composition on both systems

Results and Discussion

Retention times for seven analgesic compounds were comparable between the two systems over the full temperature range. With pre-heating, both systems exhibited a stronger decrease in retention time as temperature increased, and selectivity shifts for phenacetin and salicylic acid were observed at 2 °C intervals. Without pre-heating, retention time trends remained parallel, but selectivity changes above 42 °C were abolished. These findings highlight that mobile phase pre-heating can enhance temperature sensitivity but is not essential for baseline method transfer.

Benefits and Practical Applications

The demonstrated transfer enables laboratories to leverage existing HPLC methods on modern UPLC platforms without extensive revalidation. Consideration of temperature control options allows analysts to maintain method performance, improve throughput, and minimize instrument investment.

Future Trends and Applications

Advances in column thermostat design and active mobile phase heating promise even finer temperature regulation and selectivity control. Integration of predictive modelling and machine learning could further streamline method transfer across diverse chromatographic systems. Adoption of standardized temperature transfer protocols will enhance reproducibility in pharmaceutical and industrial analytics.

Conclusion

Successful method transfer from an Agilent 1100 Series LC System to an ACQUITY UPLC H-Class System was achieved with consistent retention and selectivity profiles. Temperature control, particularly mobile phase pre-heating, influences selectivity behavior and should be considered during method migration.

References

1. Chapter 621 Chromatography. United States Pharmacopeia and National Formulary (USP 30-NF 32 SR2), United Book Press, Inc., 2013, pp. 6376-6385.
2. Protocol for Gradient Delay (Dwell Volume) Measurement. Transferring Compendial HPLC Methods to UPLC Technology. Waters Corporation Application Notebook, 2013, pp. 67-68.
3. Gradient SmartStart. ACQUITY UPLC H-Class System Guide Revision B. Waters Corporation, 2010, pp. 5-6.
4. Schrenker H. Effect of mobile phase pre-heating on high-performance liquid chromatographic column performance: A new type of column thermostat. J Chromatogr A. 1981;213:243-252.