Shim-pack - Scepter Diol-HILIC Series - INSTRUCTION MANUAL

Importance of the Topic

Hydrophilic interaction liquid chromatography (HILIC) with dihydroxypropyl-bonded stationary phases enables efficient separation of highly polar compounds and complements reverse-phase methods.

Objectives and Overview

This manual provides practical guidelines for installation, operation, maintenance, and storage of Shim-pack Scepter Diol-HILIC columns to ensure reproducible performance and extended column life.

Methodology

Key operational parameters and practices for optimal column performance include:

• Column installation: align flow direction, use PEEK (or SUS for UHPLC) tubing with ID 0.25–0.3 mm (0.1–0.2 mm for UHPLC) and OD 1.6 mm, minimize tubing length to reduce extra-column volume.
• Pressure management: respect maximum limits (100 MPa for 1.9 µm; 45 MPa for 3–5 µm), avoid repeated operation near limits or sudden pressure changes, allow pressure to drop to zero before disconnection.
• Mobile phase selection: use high organic/water mixtures (acetonitrile/water 90/10 to 60/40), maintain at least 3% aqueous content for stable water layer, select volatile buffers (ammonium acetate/formate) at 5–20 mM, ensure no salt precipitation.
• Sample preparation: dissolve analytes in weaker solvent than eluent, filter samples and mobile phases (0.45 µm membrane), use guard columns or Ghost Trap DS to prevent particulates reaching the column.
• Cleaning and storage: flush with 50/50 acetonitrile/water (or 5/95 for strong retention), use solid-phase extraction for macromolecules, store in acetonitrile/water 90/10 to prevent salt precipitation.

Used Instrumentation

The following components and fittings are recommended for Shim-pack Scepter Diol-HILIC columns:

• Shim-pack Scepter Diol-HILIC columns (dihydroxypropyl bonded, 1.9–5 µm particles, ID 2.0–4.6 mm)
• UHPLC/HPLC systems capable of ≥60 MPa operation
• PEEK or stainless steel tubing (0.1–0.3 mm ID, 1.6 mm OD)
• Male nuts and ferrules (PEEK and 1.6 MN fittings, Nexlock, UHPLC Fitting 2 S)
• Ghost Trap DS, guard columns and semi-micro flow cells for detectors

Main Results and Discussion

Implementing these practices minimizes dead volume, prevents peak tailing and column blockages, and maintains reproducibility. Proper fitting and manual tightening avoid leaks and damage. Degassing solvents and controlling gradient salt concentration ensure stable baselines and sharp peaks, particularly for UHPLC with 1.9 µm packing.

Benefits and Practical Applications

Following these guidelines prolongs column lifetime, stabilizes retention times, improves peak shape, and supports robust analysis of polar metabolites, pharmaceuticals, and biomolecules in QA/QC and research laboratories.

Future Trends and Applications

Advances in HILIC stationary phases, UHPLC instrumentation, and coupling with mass spectrometry will expand sensitivity and resolution. Emerging applications include metabolomics, glycomics, and quality control of complex biological samples.

Conclusion

Adherence to optimized installation, solvent selection, pressure control, and maintenance protocols ensures reliable, high-performance separations with Shim-pack Scepter Diol-HILIC columns in diverse analytical contexts.