Course information
LC-MS Samples & Sample Preparation Techniques
Eliminate ion suppression and matrix interferences with targeted sample preparation strategies.
AUDIENCE: ANALYTICAL CHEMISTS & BIOANALYTICAL ANALYSTS · LEVEL: INTERMEDIATE · TRAINING TYPE: LIVE ONLINE INTERACTIVE SESSION
While modern LC-MS instruments offer exceptional sensitivity and specificity, they are highly susceptible to matrix interferences from salts, lipids, proteins, and endogenous compounds. Inadequate sample preparation directly leads to variable ion response, loss of quantitative accuracy, and excessive ion source maintenance.
This course focuses on selecting and refining sample preparation protocols tailored specifically to LC-MS requirements, ensuring robust, reproducible, and clean sample introduction.
Effective sample preparation is the most critical factor in mitigating LC-MS matrix effects and preserving long-term instrument sensitivity.
WHO IS THIS COURSE FOR?
Analytical scientists working with challenging biological, environmental, or food matrices
Bioanalytical and pharmaceutical analysts seeking to minimize matrix-induced signal suppression
QC technicians looking to standardize extraction workflows and reduce instrument maintenance downtime
WHAT YOU WILL LEARN
Evaluate the impact of matrix components on Electrospray Ionization (ESI) and APCI.
Select appropriate cleanup techniques based on analyte structure and matrix complexity.
Master Solid-Phase Extraction (SPE) sorbent selection and method development steps.
Implement Protein Precipitation (PPT) and Liquid-Liquid Extraction (LLE) protocols.
Quantify and minimize matrix effects through post-column infusion and internal standard use.
🧪 MATRIX EFFECTS & ION SUPPRESSION MECHANISMS
Causes and Consequences of Matrix Effects in ESI vs. APCI
Evaluating Matrix Factor, Process Efficiency, and Absolute Recovery
Strategies to Detect Suppression/Enhancement: Post-Column Infusion and Post-Extraction Addition
Selecting and Implementing Stable Isotope-Labeled Internal Standards (SIL-IS)
⚙️ EXTRACTION & CLEANUP METHODOLOGIES
Protein Precipitation (PPT): Organic Solvent Selection, Ratios, and Acid Additives
Liquid-Liquid Extraction (LLE): Solvent Selection, pH Control, and Salting-Out Effects
Phospholipid and Lipid Removal Strategies for Plasma and Tissue Samples
Micro-Extraction Techniques: Solid-Phase Microextraction (SPME) and Dispersive SPE (QuEChERS)
🔬 SOLID-PHASE EXTRACTION (SPE) DESIGN FOR LC-MS
SPE Sorbent Chemistries: Reverse Phase, Ion Exchange, and Mixed-Mode Polymers
Step-by-Step SPE Protocol Optimization: Conditioning, Loading, Washing, and Elution
Minimizing Elution Volumes and Solvent Evaporation/Reconstitution Workflows
Selecting LC-MS Compatible Reagents and Avoiding Polymer/Plasticizer Contaminants
🛠️ SAMPLE COMPATIBILITY & SOLVENT SELECTION
Solvent Compatibility with API Sources and Column Mobile Phases
Managing Sample Dilution, Salt Concentration, and pH Matching
Preventing Analyte Adsorption, Degradation, and Non-Specific Binding
PRACTICAL APPLICATION
Includes interactive SPE sorbent selection trees, recovery and matrix effect calculation workshops, step-by-step extraction protocol troubleshooting, and case study evaluations across biological and food safety applications.
COURSE TAKEAWAYS
Participants leave with a comprehensive toolkit to design clean, efficient extraction protocols, consistently eliminate matrix suppression, and protect LC-MS hardware from matrix-induced contamination.
