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Novel Oligonucleotide Sample Clean-up and Method Optimizations It's Not “Just Analytical but With Bigger Columns”— Purification Insourcing and Technology Strategies How to Do More with Less: All Biopharmaceutical Batch Processes Can Benefit from Multi-Column Chromatography On Replication in Biopharmaceutical Analysis Tools for Investigating the Expanding Per- and Polyfluoroalkyl Substances Universe

Novel Oligonucleotide Sample Clean-up and Method OptimizationsIt's Not “Just Analytical but With Bigger Columns”— Purification Insourcing and Technology StrategiesHow to Do More with Less: All Biopharmaceutical Batch Processes Can Benefit from Multi-Column ChromatographyOn Replication in Biopharmaceutical AnalysisTools for Investigating the Expanding Per- and Polyfluoroalkyl Substances Universe

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All App NotesBiological, Medical, and ClinicalBiopharmaceuticalsCannabisChiralEnvironmentalFood and BeverageGCGC-MSGeneralIndustrialLCLC-MSMedical/BiologicalMisc TechniquesPharmaceuticalsPolymersSample PrepSize-Exclusion Chromatography (SEC)Supercritical Fluid Chromatography (SFC)

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LCGC TV: Mary Ellen McNally on Common Error with Internal Standard Methods

February 5, 2014

Internal standards are an important tool of analytical chemists, yet errors in their usage are common. Mary Ellen McNally of DuPont Crop Protection offers advice for how to introduce an internal standard and how to avoid common errors with internal standard methods.