Preventing sample failures in bioanalysis

Importance of the topic

In bioanalytical and clinical research workflows reliable sample preparation is crucial to achieve accurate quantification at low detection limits. Solid phase extraction is widely used to isolate target analytes but conventional loose packed formats can suffer from channeling and flow variability leading to sample failures and reduced throughput. The fritless design of Thermo Scientific SOLA SPE products offers a robust alternative improving extract cleanliness and process consistency.

Objectives and Study Overview

This application note reviews the design and performance of SOLA 30 mg SPE cartridges and 96 well plates. Emphasis is placed on reproducibility across batches and injections as well as compatibility with viscous biological matrices. The goal is to demonstrate how SOLA SPE technology addresses key challenges in high throughput bioanalysis.

Methodology and Instrumentation

The SOLA platform integrates the support material and sorbent media into a solid uniform bed eliminating loose particles and frit related issues. Key features include

• Fritless sorbent construction for stable flow characteristics
• Polymeric phases HRP SCX SAX WCX and WAX
• Bed weights of 2 mg 10 mg and 30 mg
• Formats 1 mL and 3 mL cartridges and 96 well plates including microelution plates for low volume samples

Main Results and Discussion

Comparative performance data show that SOLA SPE products maintain tight reproducibility across multiple cartridges wells and product batches. Plots of signal intensity versus injection number illustrate minimal variability over 250 injections. The fritless design reduces channeling and void formation resulting in fewer sample failures even with viscous biological extracts. Historically conventional SPE formats exhibited broader response variability and pronounced batch to batch differences.

Benefits and Practical Applications

Key advantages of SOLA SPE include

• High throughput processing with consistent flow rates
• Improved batch to batch reproducibility
• Reduced risk of sample failure and carry over
• Enhanced sensitivity through microelution capabilities
• Compatibility with complex biological matrices

Future Trends and Potential Applications

Ongoing developments in SPE focus on miniaturization automation and the introduction of novel sorbent chemistries. Integration of fritless platforms with robotic liquid handlers will further streamline sample preparation. The expanding demand for bioanalysis in clinical diagnostics and pharmaceutical research is likely to drive new SPE formats tailored for emerging biomarkers and complex sample types.

Conclusion

Thermo Scientific SOLA 30 mg SPE cartridges and plates deliver a reliable fritless solid phase extraction solution offering enhanced reproducibility clean extracts and high throughput capability. Compared to traditional SPE formats SOLA products reduce sample failures support low volume workflows and ensure consistent performance across batches. These attributes make SOLA SPE a valuable tool for demanding bioanalytical applications