A method is only as good as its weakest step; sample, column, or detector.
LC‑MS PRACTITIONERS
METHOD DEVELOPERS
TROUBLESHOOTING
ISO 17025
- Designed for: LC‑MS users, method developers, and analysts seeking to build robust, validated methods and troubleshoot performance issues
- Ideal for pharmaceutical, environmental, food, and clinical laboratories
- Prerequisite: basic understanding of liquid chromatography and mass spectrometry
- Familiarity with method development concepts is beneficial
Learning outcomes
- Design LC‑MS methods tailored to analyte chemistry, matrix complexity, and regulatory requirements
- Troubleshoot method performance issues, including sample, column, and MS‑related problems
- Ensure methods are validated, reproducible, and ISO/IEC 17025‑compliant
- Document method development decisions, deviations, and corrective actions
LC‑MS APPLICATIONS, TROUBLESHOOTING & METHOD DEVELOPMENT
LIVE ONLINE INTERACTIVE SESSION · from method design to audit‑ready validation
A method is only as good as its weakest step. This course provides a systematic approach to LC‑MS method development, troubleshooting, and validation – covering everything from sample preparation and column choice to MS optimisation and ISO 17025 documentation.
1. ROLE OF LC‑MS METHOD DEVELOPMENT AND TROUBLESHOOTING IN ISO/IEC 17025
- Why method development and troubleshooting are critical: accurate, sensitive detection; reduce re‑analysis/downtime; support audit‑ready data
- Relevant ISO/IEC 17025 clauses: method validation, equipment calibration, nonconforming work, technical competence
2. SYSTEMATIC APPROACH TO LC‑MS METHOD DEVELOPMENT
Structured workflow
- Define analytes and matrix; select sample prep; choose column and mobile phase; optimise MS parameters; evaluate performance with SST/QC; document all steps
Trend‑based monitoring
- Monitor retention time, peak shape, S/N, ion suppression/enhancement, QC performance across runs
Risk‑based decision making
- When to adjust method for matrix interference; when system suitability failure invalidates results; when re‑optimisation/revalidation is needed
3. COMMON LC‑MS APPLICATIONS
- Pharmaceutical analysis: drugs, metabolites, impurities
- Food and feed safety: pesticides, mycotoxins, veterinary drug residues
- Environmental monitoring: contaminants, pollutants, water analysis
- Clinical and biomarker studies: proteomics, metabolomics, lipidomics
- Research: natural products, bioactive compounds, chemical ecology
- Case studies: multi‑residue pesticides in vegetables (QuEChERS + UHPLC‑MS/MS); metabolomics (HILIC); lipidomics (C18 + HRMS)
4. TROUBLESHOOTING LC‑MS METHOD PERFORMANCE
Sample‑related issues
- Matrix effects (ion suppression/enhancement), degraded analytes, contamination, carryover
Column/chromatography issues
- Peak broadening, tailing, co‑elution; retention time shifts; column bleed affecting baseline
MS detector issues
- Ionisation source contamination (ESI/APCI); mass accuracy drift; low sensitivity, poor S/N
Corrective actions
- Modify sample prep; optimise mobile phase, gradient, pH; replace/condition column; clean or tune MS source
5. METHOD VALIDATION AND PERFORMANCE CRITERIA
- Evaluate linearity, precision, accuracy, LOD, LOQ, recovery
- Assess matrix effects using spiked samples
- Implement system suitability criteria (retention, peak shape, MS signal)
- Ensure reproducibility across instruments, operators, batches
- ISO/IEC 17025 relevance: justify method choices, document deviations, maintain auditable data
6. PREVENTIVE STRATEGIES
- Standardise sample preparation and extraction workflows
- Maintain instrument calibration and MS tuning
- Regular column maintenance and performance checks
- Use QC standards, internal standards, reference materials
- Document all method steps, optimisations, and corrective actions
7. SYSTEM SUITABILITY AND POST‑METHOD VERIFICATION
- Use control samples to verify retention, resolution, sensitivity
- Compare performance against historical trends or validation criteria
- Confirm method readiness after column changes, maintenance, or MS tuning
8. ISO/IEC 17025 DOCUMENTATION
- Document method development rationale, optimisation steps, final parameters
- Record troubleshooting events, corrective actions, and their impact
- Maintain full traceability from sample to report
- Audit‑ready documentation showing reproducibility, validation, compliance
9. ONLINE PRACTICAL COMPONENT
- Interactive exercises: design an LC‑MS method for a given analyte and matrix
- Optimise chromatographic separation and MS detection parameters
- Troubleshoot simulated method failures (matrix interference, co‑elution, ion suppression)
- Document method development and troubleshooting in ISO/IEC 17025‑compliant logs
ESI · APCI · HILIC · RP
Troubleshooting toolkit
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