Paired Mass Distance(PMD) analysis for GC/LC-MS based non-targeted analysis2 months ago
Introduction of Paired Mass Distance analysis | PMD from the same compound | PMD from different compounds | Data format | GlobalStd algorithm | STEP1: Retention time hierarchical clustering | STEP2: Relationship among adducts, neutral loss, isotopologues and common fragments ions | STEP3: Screen the independent peaks | Extra filter with correlation coefficient cutoff | Validation by principal components analysis(PCA) | Comparison with other pseudo spectra extraction method | Benchmark different datasets by Normalized Spectral Entropy (Sample Consistency Metric) | Structure/Reaction directed analysis | Structure/reaction directed analysis for peaks/compounds only data | Wrap function for GlobalStd algorithm | Use independent peaks for MS/MS validation (PMDDA) | Shiny application | Conclusion
