Sample Preparation

Matrix Complexity of Serum, Plasma, and Urine Biological fluids present unique challenges for LC-MS analysis due to their complex matrix composition. Serum and plasma contain high protein concentrations (approximately 60-80 g/L), primarily albumin and globulins, which can bind analytes and interfere with chromatography. According to established literature, plasma and serum are characterized by increased sample […]

Overview of Environmental Metabolomics Environmental metabolomics represents a powerful analytical approach for understanding the biochemical responses of organisms to environmental stressors and contaminants. This emerging field combines the principles of traditional metabolomics with environmental monitoring to detect subtle changes in metabolite profiles resulting from exposure to pollutants, climate change, or other ecological disturbances. Unlike targeted

The Complexity of Metabolomics Samples Metabolomics samples represent one of the most challenging analytical matrices in modern science. Biological samples are notoriously dirty, containing thousands of chemical components ranging from small polar metabolites to large macromolecules like proteins and lipids. As noted in forensic and clinical applications, injecting these samples with minimal cleanup onto sensitive

1. Causes of Ion Suppression in LC-MS Ion suppression represents one of the most significant challenges in liquid chromatography-mass spectrometry (LC-MS) analysis, particularly when dealing with complex biological or environmental matrices. This phenomenon occurs when co-eluting matrix components interfere with the ionization process of target analytes, leading to reduced signal intensity and compromised analytical performance.