The Critical Role of SPE in LC-MS/MS Bioanalysis In the demanding world of bioanalysis, where pharmaceutical development, clinical research, and forensic toxicology rely on precise measurements of drugs and metabolites in biological matrices, sample preparation stands as the critical foundation for success. Liquid chromatography-tandem mass spectrometry (LC-MS/MS) has revolutionized quantitative bioanalysis with its exceptional sensitivity […]
Phospholipid Interference in LC-MS Analysis Phospholipids represent one of the most significant challenges in liquid chromatography-mass spectrometry (LC-MS) analysis of biological samples, particularly plasma. These endogenous compounds can cause severe matrix effects, leading to ion suppression or enhancement, increased analytical variability, and reduced method sensitivity. According to Waters documentation, phospholipids are “major causes of matrix
Challenges of Plasma Matrices: Proteins and Phospholipids Plasma and serum represent some of the most challenging biological matrices for analytical chemists. These complex fluids contain approximately 7% protein content, with albumin, globulins, and fibrinogen being the major constituents that increase sample viscosity and promote clot formation. More critically, plasma contains significant concentrations of phospholipids—typically 1-2
Optimizing HLB SPE for Biological Samples (Plasma and Serum) Read More »
Types of Biological Matrices in SPE Applications Solid-phase extraction (SPE) has become an indispensable tool for biological sample preparation across diverse fields including clinical chemistry, forensic science, and pharmaceutical research. The technique’s popularity stems from its ability to achieve high selectivities and recoveries while minimizing hazardous solvent consumption. Biological matrices present unique challenges that require
