A Comparison of PREMIER Columns with MaxPeak HPS Technology versus PEEK-lined Column Hardware

Importance of the Topic

Liquid chromatography often suffers from analyte loss due to adsorption on metal surfaces. Metal-sensitive analytes such as anionic or electron-rich compounds show poor peak shape, low signal, and reduced reproducibility when using traditional stainless-steel hardware. Inert column technologies aim to overcome these issues while maintaining high chromatographic performance.

Objectives and Study Overview

This study compares the performance of PREMIER columns with MaxPeak High Performance Surface (HPS) technology against PEEK-lined stainless-steel columns from two vendors. Key performance metrics include column efficiency, peak shape, backpressure, and column-to-column reproducibility.

Methodology

Stationary phase: BEH C18, 2.5 μm.
Column format: 2.1 x 50 mm.
Packed identical batches into MaxPeak HPS hardware and PEEK-lined stainless-steel from Vendor A and Vendor B.
Chromatographic conditions: isocratic separation in 75% acetonitrile at 30 °C, 0.30 mL/min flow rate, UV detection at 254 nm, 1 μL injection of octanophenone and thiourea as test compounds.

Used Instrumentation

• ACQUITY UPLC System equipped with Fixed Loop Sample Manager
• ACQUITY UPLC Tunable UV Detector
• Empower Chromatography Data System

Main Results and Discussion

Comparison of column efficiency showed:

• MaxPeak HPS columns delivered 20–25% higher plate counts than PEEK-lined hardware.
• Backpressure was ~25% lower in MaxPeak HPS columns despite identical packing procedures.
• Peak symmetry index was superior with MaxPeak HPS hardware.

Reproducibility assessment across five columns per hardware type revealed:

• MaxPeak HPS columns exhibited tight retention time consistency.
• PEEK-lined columns showed higher variability in retention time, attributed to dimensional inconsistencies along the column bore.

Volume versus void time correlation indicated a linear trend only for MaxPeak HPS hardware, supporting uniform inner diameter and packed bed quality.

Benefits and Practical Applications

Key benefits of MaxPeak HPS technology include:

• Improved analyte recovery of metal-sensitive samples
• Enhanced column efficiency and resolution
• Lower operating backpressure
• Superior column-to-column reproducibility
• Consistent peak shape without relying on mobile-phase additives or surface passivation

These advantages make MaxPeak HPS columns suitable for bioanalytical assays, pharmaceutical applications, and any analysis requiring reliable quantitation of anionic or electron-rich compounds.

Future Trends and Applications

Advancements in hybrid surface technologies will continue to address analyte-surface interactions, supporting the development of fully inert flow paths. Integration with mass spectrometry and expansion into higher-pressure regimes are expected. Further research may explore customized surface chemistries for target analytes and process-scale column designs.

Conclusion

PREMIER columns featuring MaxPeak HPS technology outperformed PEEK-lined stainless-steel hardware in efficiency, backpressure, peak shape, and reproducibility while maintaining excellent analyte recovery of metal-sensitive compounds. This technology represents a robust solution for analytical challenges associated with metal-analyte interactions.

References

1. Lauber M. et al. Low Adsorption HPLC Columns Based on MaxPeak High Performance Surfaces. Waters White Paper 720006930EN. 2020.
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4. DeLoffi M., Nguyen J. M., Izzo G. Improved Chromatographic Performance with a PREMIER Peptide C18 Column Versus a Titanium-Lined C18 Column Technology. Waters Application Note 720007022. 2020.
5. Birdsall R. et al. Increasing Chromatographic Performance of Acidic Peptides in RPLC-MS-based Assays with ACQUITY PREMIER Featuring MaxPeak HPS Technology. Waters Application Note 720007003. 2020.