HPLC Peak, Baseline & Retention Troubleshooting
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Find practical solutions for HPLC and LC-MS troubleshooting challenges, including peak shape issues, baseline instability, retention changes, pressure fluctuations, sensitivity loss, sample preparation effects, and system-related performance problems. Learn proven approaches to diagnose and correct chromatographic issues for more reliable analytical results.
Ammonium Acetate in LC-MS Methods Preventing Source Contamination and Signal Loss - Tech Information
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Avoid Distorted Peak Shapes When Using a Basic Mobile Phase pH for the Analysis of a Lipophilic Amine - Tips & Suggestions
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Broad and Asymmetrical Peak Troubleshooting in Reversed-Phase LC-MS Methods - Tech Information
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Column Particle Damage as a Cause of Frit Blockage and Elevated HPLC Backpressure - Tech Information
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Constant Pressure Method on two Instruments Producing Different Flow Rates- Troubleshooting
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Dwell Volume Effects on Gradient Retention and Method Transfer in HPLC Systems - Tech Information
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Effects of Flow Rate on Peak Area Response Decline in HPLC UV Detection - Tech Information
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Effects of Mobile Phase Ionic Strength in HILIC Methods Using Cogent TYPE-C Columns - Tech Information
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Effects of Washing and Re-using Autosampler Vials on Sample Loss and Contamination - Tech Information
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Eliminating Retention Time Drift in LC-MS HILIC Methods Using Diamond Hydride Columns - Tech Information
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Formic Acid Improves Peak Shapes Retention and Carryover for Polar Compounds with the Cogent Diamond Hydride HPLC Column - Tips & Suggestions
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Ghost Peaks from Mobile Phase Additives and Solvent Degradation in Gradient HPLC Methods - Tech Information
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Gradient Method Adjustments When Changing HPLC Column Internal Diameter - Tech Information
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High HPLC System Pressure Originating from the Pump Module Troubleshooting - Tech Information
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High Pressure Develops after Flushing a Cogent Diamond Hydride HPLC Column with Acetonitrile Cause and Solution - Tech Information
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High‑Molecular‑Weight Compounds Fail to Retain on the Cogent Diamond Hydride Column - Tech Information
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How Tight Should an Autosampler Vial Cap Be to Prevent Septa Push-Through During Injection - Tech Information
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Improving Citric Acid Retention and Peak Shape Reproducibility in LC-MS Analysis - Tech Information
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Improving Ethylenediamine Peak Shape in LC-MS Analysis Through Control of Metal Interactions - Tech Information
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Improving Glucosamine Response Consistency in HPLC Systems Through Metal Free Fluid Path Design - Tech Information
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Improving Metformin Reproducibility and Peak Shape in Plasma Sample Analysis - Tech Information
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Improving Peak Shape and Retention for Organic Acids in HILIC Methods Using Cogent Diamond Hydride Columns - Tech Information
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Improving Retention and Peak Shape Reproducibility for Citric Acid Analysis - Tech Information
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Intermittent Pressure Spikes in HPLC Systems and How to Troubleshoot Them - Tech Information
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Is TFA or formic acid better as an acidic mobile phase additive for Cogent TYPE-C columns - FAQ
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Lisinopril Assay Results Calculation Using a Dihydrate Reference Standard - Tech Information
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Lower Retention When Functional Group in a Compound Should be Ionized - Troubleshooting Tips
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Managing PFAS and Trace Contamination Sources in Chromatographic Analysis - Tech Information
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No Peaks Observed for Succinic Acid or Alpha-Ketoglutarate in LC-MS Using a Cogent Diamond Hydride Column - Tech Information
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pKa pKb and pH Considerations for HPLC Mobile Phases and Sample Diluents - Tech Information
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Platinum Catalyst Residue Evaluation on Cogent TYPE C Silica Stationary Phases - Tech Information
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Polar and Mixed‑Polarity Metabolites Strategy Using Panel Method Cogent Diamond Hydride - Tips and Suggestions
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Pressure Increases Following Sample and Blank Injections in HPLC Systems - Tech Information
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Restoring the Initial Method Results Analyzing AMP ADP ATP UDP and GPT in Biological Extracts - Troubleshooting
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Retention Behavior of Triphenylamine in HILIC Methods Using Cogent TYPE-C Columns - Tech Information
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Retention Time Variations Between HPLC Systems and Qualification Testing - Tech Information
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Selectivity Modification in an HILIC Method Using Different Mobile Phase pH - Tips & Suggestions
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Sensitivity and the Impact of Column Related Contamination in LC-MS Methods - Tech Information
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Sodium Ions and Sodium Succinate Analysis in HILIC Methods Using Cogent TYPE-C Columns - Tech Information
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Storing, Conditioning, and Maintaining Cogent Diamond Hydride HPLC Columns - Tech Information
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System Pressure Considerations When Using 90% Methanol and 10% Water with Cogent TYPE-C HPLC Columns - Tech Information
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Troubleshooting Diminished Peak Height in Biological Extract Analysis Using Cogent Diamond Hydride Columns - Tech Information
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Understanding Retention Decreases as Water Content Increases on Cogent Bidentate C18 Columns - Tech Information
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Understanding the Impact of Extra Column Volume on HPLC Method Performance - Tech Information
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Using a Dedicated Reversed Phase HPLC System for HILIC Methods Potential Problems and How to Avoid Them - Tech Information
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Using EDTA in Mobile Phases to Improve Peak Shape for Metal-Sensitive Compounds - Tech Information
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Wavelength Accuracy Troubleshooting and Qualification Issues in HPLC UV Detectors - Tech Information
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