Watrex HPLC COLUMNS

Significance of the topic

High-performance liquid chromatography (HPLC) remains a cornerstone technique in analytical chemistry for separating and quantifying a wide range of compounds. Selecting the right column chemistry and operational parameters is crucial for reliable detection, robust performance, and efficient method development across fields such as environmental monitoring, pharmaceutical quality control, food analysis, and polymer characterization.

Goals and overview of the brochure

This document presents Watrex’s line of HPLC columns, showcasing specialized stationary phases designed for ion chromatography (cations and anions), reversed-phase separations (C18), carbohydrate and organic acid analysis, ion-exclusion polymeric columns, and gel-permeation (size-exclusion) applications. It also highlights the laboratory services and global support network provided by Watrex Praha.

Methodology and instrumentation

• Ion chromatography columns (IonPlus™ CS19, AS19 and IC Anion I) operated with dilute acid or carbonate/bicarbonate mobile phases, conductivity detection with or without suppression.
• Reversed-phase DeltaSil™ 100 C18 columns using acetonitrile–water gradients and UV detection at 254 nm.
• Polymeric ion-exclusion Watrex Polymer IEX™ columns in H+, Ca2+ and Pb2+ forms for alcohols, acids and sugars, applying dilute sulfuric acid or water eluents with UV or refractive index detection.
• Gel-permeation (SEC) DeltaGel™ mixed-bed columns for molecular-weight profiling in organic solvents.
• Laboratory services including sample preparation, SPE, method development for pharmaceutical and environmental matrices, polymer GPC, chiral separations, and ion chromatography performance evaluations.

Main results and discussion

• The IonPlus CS19 cation column (7 μm, 200×4 mm) achieved efficient separation of metal ions at low ppb levels with simple nitric acid elution.
• Anion analysis using AS19 (12 μm) and IC Anion I (7 μm) columns delivered sharp peaks for common inorganic anions under carbonate/bicarbonate conditions.
• DeltaSil™ C18 columns showed high theoretical plate counts (>90 000 plates/m) for non-polar analytes such as naphthalene, combining reproducibility and broad compatibility with small-molecule assays.
• Polymer IEX phases provided robust separation of carbohydrates and organic acids at elevated temperatures (up to 90 °C) with excellent resolution and chemical stability.
• DeltaGel™ mixed-bed columns offered versatile molecular-weight discrimination for polymers and biomolecules in organic solvent systems.

Benefits and practical applications

• Enhanced method robustness through well-matched stationary phases for specific analyte classes.
• Wide range of column dimensions and particle sizes to support analytical, preparative and semi-preparative workflows.
• Seamless integration with conductivity, UV and refractive index detectors in both suppressed and non-suppressed modes.
• Comprehensive support from Watrex laboratories for method development, validation and routine analysis in construction, environmental, pharmaceutical and polymer industries.

Future trends and possibilities

• Development of smaller particle-size and core-shell columns to further increase throughput and resolution while reducing solvent consumption.
• Integration of on-line sample preparation and two-dimensional LC approaches for complex matrices.
• Advances in green chromatography with aqueous or bio-based mobile phases and sustainable stationary phases.
• Expansion of real-time data analysis and AI-driven method optimization within routine workflows.

Conclusion

Watrex’s portfolio of HPLC columns addresses diverse analytical challenges by offering tailored stationary phases for ion chromatography, reversed-phase, ion-exclusion and size-exclusion separations. Combined with specialized laboratory services, these products support accurate, reproducible and efficient workflows in research, quality control and industrial applications.

References

No external references were cited in the original material.