Category: TYPE-C Column Information
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Sub Categories
Aqueous Normal Phase ANP and How it is Useful for Polar Compound Separation - Tech Information
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Aqueous Normal Phase ANP Ballistic Gradients Compared to Same in HILIC - Tips & Suggestions
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Are there HPLC columns that could be used to separate both polar and nonpolar compounds in a single run - FAQ
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Assuring retention of polar compounds in an Aqueous Normal Phase ANP gradient in positive ion mode LCMS - Tips & Suggestions
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Buffer Concentration can Affect ANP Retention of Acids in HPLC Analyses - Tips & Suggestions
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Direct Silicon to Carbon Bonds on Cogent TYPE-C HPLC HPLC Columns Produce Longer Column Lifetimes - Tech Information
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Do Tanaka Plots for HPLC apply to columns used with Aqueous Normal Phase ANP methods - FAQ
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Eliminate broad split peaks in Aqueous Normal Phase ANP methods and a methanol diluent- Tips & Suggestions
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Glucose pyruvate taurocholic acid gamma glutamylcysteine and other analysis - Tips & Suggestions
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High molecular weight compounds that won't retain on Cogent Diamond Hydride column try Cogent Bidentate C8 300 - Tips & Suggestions
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How Can Cogent TYPE-C HPLC Columns Offer Faster Results Compared to Other Type of Silica Based Columns - FAQ
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How Can I Get Separation of Tartaric and Malic Acid in a Complex Mixture - Tips & Suggestions
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How to choose a suitable mobile phase additive for negative ionization mode LCMS - Tips & Suggestions
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How to determine concentration of an impurity in HPLC with the relative response factor RRF - How to
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How to eliminate retention time drift in LCMS with Aqueous Normal Phase ANP methods - Tips & Suggestions
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How to improve peak shapes, retention & carryover for polar compounds with the Cogent Diamond Hydride™ column - Tips & Suggestions
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How to keep the Cogent Diamond Hydride column clean when using blood as a sample - Tips & Suggestions
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I am not observing any peaks for succinic acid or alpha-ketoglutarate with the Cogent Diamond Hydride column - Tips & Suggestions
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Injection Technique for Aqueous Samples using Cogent TYPE-C Columns in ANP - Tips & Suggestions
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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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Is TYPE-C Silica a high purity support and have a low metal content silica like Type B silica - FAQ
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Issues arising from changes in mobile phase with acids to one with ammonium salts. Tips & Suggestions
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LFER studies compared to Log D data in describing the Aqueous Normal Phase ANP retention - Tips & Suggestions
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Lower retention is observed when functional group in a compound is ionized - Tips & Suggestions
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Mobile Phase recommendation Cogent Diamond Hydride columns for use with serum samples in Aqueous Normal Phase LCMS - Tips & Suggestions
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Modify selectivity in an ANP method of HPLC using different mobile phase pH - Tips & Suggestions
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My LCMS source was getting white film on it and at the same time the background noise was very low so is my Diamond Hydride column bleeding packing material - FAQ
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My method uses an standard type-B silica based HPLC column is there a Cogent TYPE-C column equivalent substitute - FAQ
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Polar And Non Polar Peptides Analyzed by LCMS with an Aqueous Normal Phase ANP Method - AppNote
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Restoring the initial results with a method for analyzing AMP ADP ATP UDP and GPT in biological extracts - Tips & Suggestions
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Solving baseline problems in ANP methods with the Cogent Diamond Hydride column - Tips & Suggestions
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Suggestion for separation of phenylephrine HCl acetaminophen and dextromethorphan - Tips & Suggestions
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Troubleshooting problems with poor HPLC runs before the examining the column - Tips & Suggestions
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Two gradients to use for analysis of hydrophilic and or hydrophobic molecules in the same Aqueous Normal Phase ANP method - Tips & Suggestions
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Understanding some of the differences between HILIC columns and TYPE-C columns - Tips & Suggestions
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Use a low concentration of salt in your mobile phase to avoid ion suppression and build up on your inlet source - Tips & Suggestions
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Using different Cogent HPLC stationary phases for different Selectivity - Tech Information
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Using temperature changes for separations of terpenoids with the Cogent Bidentate C18 and UDC-Cholesterol HPLC columns - Tips & Suggestions
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Using triethylamine TEA in Aqueous Normal Phase ANP methods for simple sugars - Tips & Suggestions
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Using two HPLC columns together in a tandem separation for polar and non polar retention - Tips & Suggestions
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What are some notable examples of journal articles that feature Aqueous Normal Phase ANP methods in metabolomics studies - FAQ
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What are the main differences between Cogent Amide columns and other brands of Amide - FAQ
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What can cause changing retention times and a peak showing up in my blank with a Silica-C column - FAQ
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What effect does high injection volume have on column performance in Aqueous Normal Phase ANP HPLC- FAQ
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What is the most effective way to clean HPLC columns after or before use - Tips & Suggestions
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What pressure should I expect with a Diamond Hydride 2.o HPLC column at flow rates from 0.2 to 2.0mL / min - FAQ
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Which acid or base additive should I choose for positive or negative ion mode in LC-MS - FAQ
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Which Cogent TYPE-C column do you recommend for the separation of positional isomers by HPLC or LCMS - FAQ
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Which column do you suggest for Cocaine & metabolite Ecognin separation - Tips & Suggestions
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Why do I have lower than normal back pressure with Cogent Diamond Hydride HPLC columns - FAQ
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