Agilent InfinityLab LC Series Mass Based Fraction Collection Concept Overview

Importance of the topic

Mass-based fraction collection enhances the precision and efficiency of preparative liquid chromatography workflows. By integrating real-time mass detection with automated fractionation, this approach ensures collection of pure target compounds, reduces solvent consumption, and accelerates method development in pharmaceutical, biochemical, and industrial applications.

Objectives and overview of the article

This technical note outlines the concept, hardware and software requirements, method setup, calibration procedures, and result evaluation for the Agilent InfinityLab Mass-Based Fraction Collection (MBFC) system. It aims to guide users through system installation, configuration in OpenLab CDS 2.x, and practical steps to achieve reliable fractionation based on mass signals.

Methodology and used instrumentation

The MBFC system comprises:

• InfinityLab LC preparative pump with UV detector
• Flow modulator to split a small flow to the iQ MSD
• Make-up pump to guide the diverted stream
• Agilent iQ MSD for mass detection (ESI, MMI, APCI options)
• Delay coil ensuring proper time offset between detection and collector
• Preparative fraction collector

Capillary and tubing kits are selected according to the flow range (1–200 mL/min). Software setup requires OpenLab CDS 2.8 with Feature Pack 2, LC driver 3.10, and LCMS driver 3.2. Network configuration uses CAN and LAN connections.

Main results and discussion

Proper configuration of the MSD as a peak detector, defining adduct masses and triggers, and adding override columns for target mass and threshold enable selective fraction collection. Delay calibration using a colored dye mixture ensures accurate timing between MS signal and fraction collector. The system reliably collected three distinct dye fractions (orange, blue, yellow) under gradient conditions, demonstrating correct delay compensation and method performance.

Benefits and practical applications

• High selectivity: fractions are triggered by specific mass/ adduct signals
• Improved purity: real-time mass feedback prevents co-elution artifacts
• Reduced solvent usage: precise timing minimizes waste
• Streamlined workflows: integration with OpenLab CDS accelerates method development

Future trends and potential applications

Emerging developments include tighter integration of AI-driven peak finding, high-throughput preparative screening, and multi-dimensional fractionation combining UV, MS, and other detectors. Adaptation to ultra-high flow rates and new ionization sources will expand applications in peptide, oligonucleotide, and natural product purification.

Conclusion

The Agilent InfinityLab MBFC concept provides a robust framework for mass-triggered fractionation in preparative LC. Through careful hardware setup, software configuration, and calibration, users achieve reproducible and efficient collection of target analytes. This methodology supports high-purity sample preparation in research and industrial environments.

References

1. Agilent InfinityLab LC Series Mass-Based Fraction Collection Concept Overview, Technical Note, Agilent Technologies Inc., 2025.