Choosing the best vial for your LC and LC/MS experiment

Significance of the Topic

Recent advances in liquid chromatography and mass spectrometry have greatly enhanced detection limits, but overlooking vial material effects can introduce variability and compromise analytical accuracy.

Objectives and Study Overview

This work explores how alkali metals in borosilicate glass vials influence LC and LC/MS results and presents low-alkali treated vials as a practical solution for reliable analyses.

Methodology and Instrumentation

Key interactions between vial inner surfaces and samples were examined, focusing on adsorption of basic compounds and elution of metal ions. Sodium release was measured using atomic absorption spectroscopy in accordance with USP 660 standards.

Main Results and Discussion

Borosilicate vials can release sodium that deposits on walls, forming NaOH hot spots, promoting glass delamination, pH shifts, unexpected impurity peaks, and adsorption of analytes. Comparative tests showed Shim-vial low-alkali treated vials exhibit substantially lower sodium elution than conventional types across multiple formats, with consistent performance verified batch-to-batch.

Benefits and Practical Applications

Low-alkali vials improve reproducibility, sensitivity, and quantification in diverse fields, including:

• Small-molecule pharmaceuticals – reduces adsorption of basic drugs
• Food safety – stabilizes pesticide and veterinary drug residues
• PFAS analysis – enables consistent detection across chain lengths
• Nucleic acid therapeutics – minimizes adsorption of modified oligonucleotides
• Environmental monitoring – supports multi-component pollutant analysis

Future Trends and Opportunities

Advances in surface engineering may further decrease ionic and hydrophobic interactions. Integration with automated sampling and real-time quality control can streamline workflows. Emerging coatings or treatments could expand applications to novel analytes and high-throughput platforms.

Conclusion

Applying low-alkali treatments to LC and LC/MS vials is essential for achieving accurate, reproducible, and cost-effective analyses by minimizing contamination and adsorption artifacts.

References

1. Gamal Abd-Elsatar A, Elsayed H, Kanková H, et al. Ion-exchange enhancement of borosilicate glass vials for pharmaceutical packaging. Open Ceramics. 2024;20:100689. doi:10.1016/j.oceram.2024.100689