Chapter Four · failure evidence
What Gas & Liquid Chromatography (GC-MS/HPLC) got wrong, from 32 dissertations
The records evaluate various gas and liquid chromatography techniques across synthetic, environmental, and biological analytical applications. Authors reported recurring methodological hurdles including column fouling, matrix interferences, inadequate detection sensitivity, and throughput bottlenecks. These records come from PhD theses at 14 institutions, 2021 to 2026. Each links to its thesis. They were extracted by language models reading the full text, so treat each as a lead to read, not a verdict.
Column fouling, physical blockage, and stationary phase degradation impair chromatographic performance
Columns suffered physical blockages, overloading, or irreversible damage caused by polysaccharide, lipophilic, or polymerizing sample matrix components. Reused cartridges and aged columns also developed retention time shifts, loss of peak resolution, and severe baseline drift over time.
Tried and failed
direct thermal desorption gas chromatography-mass spectrometry applied to sugar-rich headspace gas samples. Outcome: unstable. Reason: volatile sugar polymerization upon heating overloaded and damaged the chromatography column
Considered and rejected
Considered and rejected: Rejected setting up a post-hoc calibration curve years later for GC-MS quantification due to column aging, baseline drift, and retention time shift over time.
Non-invasive testing for the diagnosis and assessment of colorectal cancer and adenomatous polyps · Imperial
Considered and rejected
Considered and rejected: Abandoned HPLC for ethanol quantification due to repeated sequence stoppages/column blockage (hypothesised to be caused by cyanobacterial slime coat constituents), switching to a 96-well microtiter enzymatic assay.
Engineered solar-driven recycling systems for sustainable fertilisation · Imperial
Considered and rejected
Considered and rejected: Rejected direct semi-preparative HPLC on crude methanol extracts because lipophilic and polysaccharide contaminants foul and irreversibly damage RP-HPLC columns.
Microcystins as Lead Structures for Anticancer Agents · Publikationssystem UB Tuebingen
Lost to a baseline
Flash chromatography C18 cartridges suffered from severe retention time shifts and loss of resolution upon reuse compared to fresh columns or Sephadex LH-20.
Microcystins as Lead Structures for Anticancer Agents · Publikationssystem UB Tuebingen
Matrix interferences, preparation artifacts, and background contamination compromise quantitative accuracy
Complex sample matrices caused severe chemical interferences and required problematic derivatization steps that hindered purity and stability. Analytical accuracy was further compromised by solvent dilution artifacts, instrument background contamination in blank samples, and failure of reference compounds to distinguish samples from blanks.
Considered and rejected
Considered and rejected: Rejected gas chromatography (GC) due to the requirement of chemical derivatization for thermal stability and higher susceptibility to matrix effects compared to LC-MS/MS.
Tried and failed
Single-step extraction chromatography purification applied to Low-concentration analyte in complex geological matrices. Reason: Failed to achieve required chemical purity due to severe matrix interference in trace samples
Uncovering Geochemical Evidence for the Moon's High-energy Giant-impact Origin · Harvard
Tried and failed
using endogenous volatile compound as quality control reference applied to breath sample gas chromatography mass spectrometry. Outcome: no signal. Reason: it showed no clear separation between biological breath samples and non-biological blank controls
Non-invasive testing for the diagnosis and assessment of colorectal cancer and adenomatous polyps · Imperial
Tried and failed
solvent dilution before liquid chromatography mass spectrometry applied to trace aqueous analyte quantification. Reason: interfered with analyte concentration quantification in LC-MS
Tire Wear Particle Characterization and PFAS Adsorption · UT Austin
Tried and failed
solid-phase extraction with liquid chromatography-mass spectrometry applied to trace artificial sweetener quantification in water. Reason: instrumentation contamination caused target analyte to be present in all blank samples
Inadequate sensitivity and high detection limits prevent trace analyte detection
Liquid and gas chromatography methods frequently failed to detect trace target compounds that fell below analytical detection limits or produced insufficient peak areas. Specialized configurations such as capillary liquid chromatography and cryogenic trapping with sorbent elution offered poorer sensitivity than standard HPLC or direct headspace injection baselines.
Considered and rejected
Considered and rejected: Rejected capillary liquid chromatography (CLC) for the analysis of ionizable and polar PFAS due to poor sensitivity compared to HPLC.
Environmental Monitoring of Per-and Polyfluoroalkyl Substances Using Microextraction Methodologies · DSpace at SUNY Buffalo
Tried and failed
thermal desorption gas chromatography-mass spectrometry applied to trace polar volatile organic compounds. Outcome: no signal. Reason: insufficient peak area and poor detection sensitivity for highly polar short-chain volatile compounds
Breath analysis for the non-invasive assessment of colorectal cancer · Imperial
Tried and failed
targeted liquid chromatography mass spectrometry screening applied to trace contaminants in drinking water. Outcome: no signal. Reason: analyte concentrations were below the analytical detection limit in point-of-use samples
Occurrence of Per- and Polyfluoroalkyl Substances (PFAS) in Private Water Supplies in Southwest Virginia · Virginia Tech
Lost to a baseline
Hydride cryogenic trapping with Tenax-GC followed by n-heptane elution gave unsatisfactory LOD (150 ng dm-3) compared to direct headspace GC-FID injection (100 ng dm-3).
AN INVESTIGATION OF THE FEASIBILITY OF BIOMETHYLATION FOR GROUP IV METALS AND COMPOUNDS · De Montfort Open Research Archive (DORA)
Excessive analysis times and low separation throughput create processing bottlenecks
Chromatographic methods like size exclusion and column chromatography caused significant decreases in throughput and required excessive run times. Researchers abandoned or rejected these techniques in favor of faster direct TLC, HPLC, mass spectrometry, or enzymatic assays.
Considered and rejected
Considered and rejected: Rejected gas chromatography–mass spectrometry (GC/MS) as the primary analytical method due to sample destruction, higher cost, and longer run time per sample.
Dacian Use of Roman Imports and the Preservation of Identity: A FTIR Spectroscopic Survey of Ceramic Residues from Four Sites in Braşov County, Transylvania, Romania · DSpace at SUNY Buffalo
Tried and failed
radioactivity- or conductivity-based chromatography and TLC applied to high-throughput lipid quantitative relative profiling. Outcome: too slow. Reason: unsuited for high-throughput quantitative profiling compared to modified ELISA and mass spectrometry methods
A lipidomic approach to elucidating the effects of antifungal compounds on signalling in fungi · Imperial
Tried and failed
size exclusion chromatography purification applied to chemical synthesis product. Outcome: too slow. Reason: resulted in significant decreases in synthesis throughput
Toward a Sensor for DNA Supercoiling · Harvard
Considered and rejected
Considered and rejected: Abandoned column chromatography on silica gel G due to requiring subsequent TLC and excessive analysis time compared to direct TLC/HPLC.
METABOLIC STUDIES OF 2-AMINO-I,8-NAPHTHYRIDINE-3-CARBOXAMIDE · HARVEST
Chromatographic sampling and separation speeds cannot support real-time transient monitoring
Gas and liquid chromatography were rejected for operando tracking because they require ex situ sampling and destroy sample gases, making them unable to capture rapid reaction kinetics. In coupled instrument configurations, long sweep times of downstream spectrometers were too slow to resolve transient chromatographic peaks.
Considered and rejected
Considered and rejected: Rejected direct gas chromatography (GC), HPLC, and NMR for operando product tracking due to their inability to capture transient reaction kinetics in real time.
ADVANCING ELECTROCATALYSIS WITH ATOMISTIC INSIGHTS AND OPERANDO METHODS · Cornell
Considered and rejected
Considered and rejected: Rejected gas chromatography and mass spectrometry for reaction monitoring because they require ex situ sampling and destroy sample gas.
Instrument development for exploring the influence of interfacial chemistry on aerosol growth, aging, and partitioning of gases · Virginia Tech
Considered and rejected
Considered and rejected: Coupling liquid chromatography directly to frequency-modulated ion mobility Orbitrap MS was rejected because FTIM sweep times of at least 2 minutes are too slow compared to the required LC peak timescales (≤ 1 s).
Developing Ion Mobility-Mass Spectrometry Techniques to Increase Sensitivity and Resolution for Carbohydrate Mixture Analysis · Georgia Tech
Mobile phase and retention mechanism incompatibilities cause premature elution and ionization suppression
Analytes eluted prematurely near the void volume without adequate retention or failed to exhibit expected retention shifts when solvent ratios were adjusted under dominant ionic mechanisms. Additionally, necessary chromatographic separation buffers directly suppressed analyte ionization during hyphenated mass spectrometry detection.
Tried and failed
reversed-phase liquid chromatography-mass spectrometry applied to polymer degradation product detection. Outcome: no signal. Reason: the required chromatographic buffer inhibited ionization in mass spectrometry
Engineering the workhorse of biology : the future of protein engineering in three polypeptides · UT Austin
Tried and failed
hydrophilic interaction liquid chromatography gradient applied to polar chemical standard mixtures. Reason: analytes eluted prematurely near the void volume within four minutes without adequate chromatographic retention
Evaluation of Chemicals of Emerging Concern and Their Sub-Lethal Biological Effects in Environmental Waters Using Targeted and Non-Targeted Mass-Spectrometry-Based Analyses · DSpace at SUNY Buffalo
Tried and failed
reducing organic solvent content in mixed-mode chromatography applied to retention time optimization of polar analytes. Reason: ionic retention mechanisms dominated over hydrophobic interactions, preventing significant retention changes
Phosphonate biogeochemical cycling in the marine environment: from an ocean scale to a molecular scale · Woods Hole
Left open by the authors
Problems the authors named and did not get to.
Left open
Apply LC-MS to determine organic contaminant degradation pathways and radical-induced pathogen inactivation mechanisms during UV/peroxyacid treatment. Blocker: Requires wet lab facilities, liquid chromatography-mass spectrometry (LC-MS) instrumentation, and chemical/biological samples
Evaluating Peroxyacid and UV/Peroxyacid Disinfection: Pathogen Inactivation, Byproduct Formation, and Co-Removal Of Micropollutants · Georgia Tech
Left open
Investigate kinetics of Diels-Alder polymer solvolysis and dissolution at low temperatures using gel permeation chromatography to track fragmentation sizes. Blocker: Requires wet lab facilities, polymer synthesis, and GPC equipment
Development Of A High-Performance Reversible Crosslink Epoxy Composite By Using Diels Alder Chemistry · Georgia Tech
Left open
Compare the quantification of monoclonal proteins using the Hevylite immunoassay against liquid chromatography-tandem mass spectrometry (LC-MS/MS). Blocker: Requires patient serum samples and wet lab LC-MS/MS equipment.
Left open
Optimize UPLC-MS/MS chromatography for lysophosphatidic acid species using ACQUITY Premier BEH Amide HST columns to reduce peak tailing. Blocker: Requires a wet chemistry laboratory with UPLC-MS/MS equipment, analytical standards, and specialized chromatography columns
Left open
Develop an extraction and secondary chromatographic method using polar sorbents or anion exchange resins to retain short-chain PFAS analytes. Blocker: Requires an analytical chemistry wet lab, chromatography equipment, and chemical standards.
Evaluating "Forever Chemicals" from Soup to Nuts: Sample Preparation, Targeted Analysis, and Suspect Screening for the Characterization of Per- and Polyfluoroalkyl Substances (PFAS · DSpace at SUNY Buffalo
Left open
Implement on-column Raman spectroscopy through a pressure-resistant sapphire window for step-by-step scan imaging of resin beads under flow conditions. Blocker: Requires specialized physical wet-lab chromatography equipment and a high-pressure sapphire optical cell
Monitoring of biotherapeutic purification by vibrational spectroscopy · Imperial
Left open
Pack functionalized fibrous silica particles into shorter HPLC columns and measure pressure differences and analysis times. Blocker: Requires a wet chemistry laboratory, chemical synthesis equipment, and HPLC instrumentation to pack and test physical columns.
Evaluation of Fibrous Silica Particles for Chromatographic Applications and the Analysis of Human-Derived Biofluids by HPLC and Capillary Electrophoresis · DSpace at SUNY Buffalo
Left open
Use gas chromatography or ion mobility spectrometry to resolve structural isomers and identify RO2 tracer species in VOC oxidation experiments. Blocker: Requires a physical experimental chamber and advanced analytical chemistry instruments (GC, IMS).
Left open
Perform gas chromatography on fermented coffee bean samples to identify predominant volatile compounds and correlate them with sensory attributes. Blocker: Requires physical fermented coffee samples and a gas chromatography lab apparatus
Left open
Develop a gas chromatography-mass spectrometry (GC/MS) analytical method to directly identify atmospheric reactive mercury chemical species. Blocker: Requires a physical analytical chemistry laboratory, GC/MS instrumentation, chemical standards, and atmospheric sampling access.
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