Beyond the Boundaries of LC-MS Sensitivity and Throughput with the Next Generation All-In-One Nano-, Capillary-, and Micro-Flow UHPLC System

Importance of the topic

This summary outlines the evaluation of a next-generation UHPLC platform designed to advance bottom-up proteomics workflows by enhancing sensitivity, throughput and operational robustness across nano-, capillary- and micro-flow regimes. The development addresses longstanding challenges in hardware resilience, method versatility and ease of use to support both discovery and targeted proteomics applications.

Objectives and Study Overview

The study systematically assesses the Thermo Scientific Vanquish Neo UHPLC system for bottom-up proteomic analyses. Key goals include:

• Benchmark single-shot deep proteome profiling performance.
• Develop high-throughput short-gradient methods for large-scale sample cohorts.
• Evaluate long-term stability and reproducibility in nano- and micro-flow operations.

Methodology and Instrumentation

The evaluation employed:

• Vanquish Neo UHPLC system with ProFlow XR active flow control and SmartInject technology.
• EASY-Spray PepMap Neo and Double nanoViper PepMap Neo columns (75 µm ID, lengths 150–750 mm, 2 µm particles).
• Orbitrap Exploris 480 MS for data-dependent acquisition in nano- and capillary-flow modes.
• TSQ Altis triple quadrupole MS for targeted micro-flow peptide quantification.
• Solvent systems of water/0.1% formic acid (A) and 80/20 acetonitrile/water with 0.1% formic acid (B).
• Sample matrices including HeLa Digest spiked with PRTC peptides and BSA protein digest.

Main Results and Discussion

Key findings include:

• Deep proteome coverage: Over 7,000 proteins and ~90,000 peptides identified in a single 240-minute nano-flow run at 1 µg load.
• High throughput capability: Developed methods with cycle times from 8 to 60 minutes, enabling up to 180 samples per day with MS utilization rates of 68–95%.
• Enhanced separation efficiency: 75 cm columns reduced median FWHM by 2 seconds for half of peptide peaks compared to 50 cm columns in a 90-minute gradient.
• Long-term nano-flow robustness: 1,600 BSA injections over six months showed stable retention times (<0.3% RSD) and consistent UV detection.
• Micro-flow reproducibility: 760 repeated injections over 7.5 days achieved retention time RSD <0.15% for 11 of 12 PRTC peptides, demonstrating high quantitative precision.

Benefits and Practical Applications

This all-in-one UHPLC platform offers:

• Improved proteome depth without sacrificing throughput.
• Scalable workflows from discovery to targeted quantification.
• Robust performance minimizing downtime and maintenance.
• High retention time precision enabling reliable large-cohort studies.

Future Trends and Opportunities

Emerging possibilities include:

• Integration with automated sample handling for higher throughput.
• Adoption in clinical and industrial proteomics for routine QA/QC applications.
• Coupling with next-generation mass spectrometers for deeper coverage.
• Software-driven method optimization leveraging AI for accelerated workflow development.

Conclusion

The Vanquish Neo UHPLC system extends the boundaries of LC-MS sensitivity, throughput and robustness across multiple flow regimes. Its versatile design supports single-shot deep proteome profiling and high-throughput quantification with excellent reproducibility, making it a powerful solution for both fundamental research and applied proteomics.

References

• Zheng R. et al. Vanquish Neo UHPLC system sets new performance standards for single-shot nanoLC-MS bottom-up proteomics. TN74152 (2021).
• Zheng R. et al. Fast, sensitive, and reproducible nano- and capillary-flow LCMS methods for high-throughput proteome profiling using the Vanquish Neo UHPLC system. TN000138 (2021).
• Pynn C. et al. Robust long-term Vanquish Neo UHPLC system operation enabling high-pressure nanoLC separations. TN000172 (2021).
• Meding S. et al. Ultra-robust micro-flow LC-MS/MS for targeted high-throughput peptide quantification using the Vanquish Neo UHPLC system. TN74161 (2021).