14th International Symposium on Hyphenated Techniques in Chromatography and Separation Technology - Programme

Significance of the Topic

The HTC-14 programme represents a concentrated overview of contemporary advances in separation science and hyphenated analytical techniques, with special emphasis on multidimensional chromatography, LC-MS/LC×LC, GC×GC, ion mobility, SFC, and bioanalytical applications. These methods underpin critical industrial and academic needs: high-resolution characterization of complex mixtures (petrochemicals, biopharmaceuticals, food matrices, environmental samples), trace-level detection in bioanalysis and toxicology, and improved throughput and robustness for routine QA/QC. The conference format highlights both fundamental advances and immediately applicable workflows for laboratories facing complex analytical challenges.

Objectives and Overview of the Programme

The HTC-14 meeting aimed to:

• Present state-of-the-art theory and practice in one- and two-dimensional separations.
• Showcase hyphenation strategies combining chromatography with mass spectrometry, ion mobility, FTIR, NMR and other detectors.
• Bridge method development, chemometrics and automation approaches for complex sample analysis.
• Provide industry–academic exchange through plenaries, keynote lectures, oral communications, poster sessions and vendor seminars.

Programme highlights included plenary lectures on building ideal chromatography systems, the role of LC-MS and LC×LC for biologics, and developments in Orbitrap and SFC technologies, plus dedicated tracks on petrochemical/industrial analysis, high-performance separations, emerging applications and detection strategies.

Methodology and Approach Presented

Rather than a single study, the programme compiles methodological advances across many techniques. Recurring methodological themes were:

• Comprehensive 2D separations (LC×LC, GC×GC): theory, practical implementations (flow- and heart-cutting modulation), and ways to increase peak capacity and sensitivity.
• Hyphenation strategies: interfacing chromatography with high-resolution MS (TOF, Orbitrap), quadrupole MS, ion mobility spectrometry (IMS), FT-ICR MS and alternative ion sources for selective ionisation.
• Sample preparation and miniaturization: microsampling, solid-phase microextraction, dried blood microsamples, and low-volume microextraction techniques to support trace-level bioanalysis.
• Method development and chemometrics: Bayesian and automated data analysis, retention-time prediction, peak shape modeling, and interpretive optimization for two-dimensional separations.
• Novel detection and coupling: use of drift-tube IMS for feature alignment, vacuum ultraviolet spectroscopy as complementary GC detector, FTIR and low-field NMR coupled to SEC, and multi-detector GPC/SEC platforms.

Used Instrumentation

The programme explicitly referenced a broad range of instrumentation and interfaces commonly used in modern separation science. Key items include:

• Liquid chromatography platforms: UHPLC/UHPSFC/UHPSFC-QTOF and nano-UHPLC coupled to ESI-MS/MS.
• Multidimensional chromatography hardware: LC×LC systems (heart-cutting and comprehensive), GC×GC flow- and thermal-modulation setups, and GC-prep systems for preparative multidimensional isolation.
• Mass spectrometers: Triple quadrupole, quadrupole time-of-flight (QTOF), time-of-flight (TOF), high-resolution Orbitrap, FT-ICR-MS, and ICP-MS for elemental coupling.
• Ion mobility spectrometers: drift-tube IMS integrated with HPLC-TOF configurations for separation orthogonality.
• Alternative ion sources and soft ionisation methods: soft electron ionisation, secondary electrospray ionization (SESI) and new API source designs.
• Detection complements: vacuum ultraviolet detectors, FTIR and low-field NMR for SEC, evaporative light scattering detectors (ELSD), UV, and fluorescence options.
• Sample handling and preparation devices: microfluidic platforms, on-line suppressors, enzyme-immobilized systems, magnetic nanoparticle reactors, and microsampling tools for dried blood and breath condensate analysis.

Main Themes, Results and Discussion

Because the programme is a synthesis of talks and posters rather than a single experiment, the key outcomes are thematic advances and consensus directions rather than numerical results. Principal messages include:

• Multidimensional approaches continue to mature: GC×GC and LC×LC deliver substantially increased resolving power for complex matrices; heart-cutting strategies and flow-modulation broaden applicability by simplifying hardware or focusing sensitivity on targets.
• Hyphenation with high-resolution MS and IMS enriches characterization: coupling orthogonal separation (IMS or 2D chromatography) with HRMS enables confident annotation, improved peak alignment and better handling of isomers and coeluting species.
• Sensitivity and selectivity gains derive from both front-end sampling and detector innovation: large-volume injections, post-column refocusing, novel ion sources and selective ionization strategies reduce matrix effects and expand dynamic range for trace analysis.
• Miniaturization and automation are practical imperatives: microfluidic devices, on-line sample preparation and Bayesian/automated data workflows lower analyst burden and improve reproducibility for routine and regulatory environments.
• SFC and combined GC/LC strategies are increasingly seen as complementary tools: modern SFC methods (including UPC2-MS coupling) offer rapid separations for chiral and nonpolar analytes, while combined GC and LC approaches address analyte polarity breadth in food and environmental analysis.

Benefits and Practical Applications

The programme emphasized real-world impacts:

• Industry-relevant workflows for petrochemical characterisation, diesel and shale oil analysis, and VOC profiling that inform process control, product quality and emissions monitoring.
• Biopharmaceutical analysis tools for intact protein separation, antibody-drug conjugate characterization, viral vaccine development and bioanalysis without antibodies, improving drug development pipelines and regulatory submissions.
• Food safety and forensic applications leveraging multidimensional separations to reduce sample preparation and to resolve complex contaminant profiles (phthalates, allergens, migration products).
• Clinical and environmental monitoring enabled by microsampling, sensitive LC-MS/MS assays and hyphenated platforms for metabolic phenotyping and trace contaminant quantification in wastewater and biological fluids.

Future Trends and Possibilities for Application

Recurring forward-looking themes identified across sessions suggest these trends:

• Tighter integration of separation orthogonality (LC×LC, GC×GC, IMS) with HRMS will become routine for complex-characterization workflows, supported by improved software for data reduction and annotation.
• Further miniaturization and on-line sample processing will expand the reach of high-sensitivity assays in clinical and field settings, including portable GC-MS and lab-on-chip devices.
• Broader adoption of soft and selective ionisation techniques will improve molecular identification, reduce fragmentation-induced ambiguity and enable more accurate quantification in complex matrices.
• Machine learning and Bayesian frameworks will accelerate method development, retention prediction and automated quality control, reducing time-to-result and method transfer effort.
• Hyphenated multi-detector systems (e.g., SEC coupled to MALS, FTIR and NMR) will increase adoption for polymer, protein and conjugate characterization where both molecular weight and chemical composition are required.

Conclusion

HTC-14 encapsulates the current state of separation science where multidimensional separations, advanced hyphenation, detector innovation and streamlined sample handling converge. The programme balanced fundamental studies—peak shape theory, intra-particle diffusion, thermal effects—with practical solutions for industry and regulatory contexts. Together, these developments point to more powerful, faster and more automated analytical pipelines that address complexity in petrochemical, pharmaceutical, food, environmental and clinical matrices.