EVOLUTE EXPRESS ABN On-line SPE Cartridges

Importance of the Topic

The integration of solid-phase extraction (SPE) with online analysis is a critical advancement in analytical chemistry, streamlining sample preparation and improving throughput for environmental, pharmaceutical, and industrial applications. The Evolute Express ABN online SPE cartridges offer a versatile sorbent that addresses the need for broad analyte coverage, robustness under extreme pH conditions, and compatibility with fully automated workflows.

Study Objectives and Overview

This document presents the development and characteristics of the Evolute Express ABN polymeric sorbent in online SPE cartridge format. Key objectives include demonstrating sorbent versatility for acidic, basic, and neutral compounds, outlining recommended operating conditions, and providing guidance for method development in LC-MS/MS applications.

Methodology and Used Instrumentation

The sorbent combines non-polar (hydrophobic) and polar (hydrophilic) interactions, featuring:

• Nominal particle size: 20 µm
• Pore size: 40 Å
• Surface area: 400 m²/g
• pH stability range: 1–14
• Maximum operating pressure: 4000 psi
• Recommended flow rates: 1–4 mL/min for loading, <1 mL/min for backflush/separation

The cartridges are fully water-wettable, eliminating the need for storage in solvent. Typical mobile phase conditions are:

• Loading phase: 0–5% acetonitrile in water with 0.1% formic acid
• Elution phase: 5–100% acetonitrile in water with 0.1% formic acid

Method development tips include adjusting sample pH to optimize recovery of acidic or basic analytes, filtering high-particulate samples, and noting that each cartridge can sustain over 200 injections, depending on matrix complexity.

Key Results and Discussion

The Evolute Express ABN sorbent exhibits strong retention and recovery for a wide range of pharmaceuticals, personal care products, and general organics. Its water-wettable nature ensures reproducible performance without reconditioning. The combination of hydrophilic and hydrophobic functional groups allows effective extraction across diverse compound classes, outperforming traditional C18 and PLRP materials in robustness and versatility.

Benefits and Practical Applications

This online SPE cartridge system provides:

• Automated sample preparation directly coupled to LC-MS/MS
• Reduction in manual handling and potential contamination
• High throughput with minimal downtime between runs
• Compatibility with environmental, pharmaceutical, and food safety analyses

The robust pH range and pressure tolerance make it suitable for challenging sample matrices and demanding analytical protocols.

Future Trends and Opportunities

Advances in sorbent chemistries and microflow LC systems will further enhance the efficiency of online SPE workflows. Potential developments include tailored sorbents for ultra-trace analytes, integration with multidimensional separations, and expansion into high-resolution mass spectrometry platforms. Increased automation and data-driven method optimization will drive faster, more reliable analyses in regulated environments.

Conclusion

The Evolute Express ABN online SPE cartridges represent a significant improvement in automated sample preparation, combining versatile analyte coverage, ease of use, and robust performance. Their integration into LC-MS/MS systems enables high-throughput, reproducible workflows for a variety of analytical applications.

References

• Biotage Technical Note PPS424: Guidance on Online SPE-LC-MS/MS Method Development
• Biotage Product Brochure, Evolute Express ABN Online SPE Cartridges, 2016