Category: Diamond Hydride FAQ
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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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Biological extracts Diamond Hydride columns and LCMS ion source diminished peak height problem - FAQ
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Blocked HPLC column from proteins from the sample matrix can be recovered - Tips & Suggestions
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Can I use phosphoric acid or sodium phosphate with the Cogent Diamond Hydride HPLC column - FAQ
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Can I use the Cogent Diamond Hydride column without mobile phase additives like formic acid - FAQ
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Causes of high baseline noise with Cogent Diamond Hydride HPLC column - Tips & Suggestions
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Do Cogent TYPE-C Silica columns have a partial positive charge and if so is retention for basic compounds reduced because of this - Tech Information
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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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High pressure develops after flushing a Cogent Diamond Hydride column with acetonitrile cause and solution - FAQ
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How can I restore my Diamond Hydride HPLC column after I ran out of mobile phase and air was accidently introduced into it - FAQ
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How do I avoid distorted peak shapes when using a basic mobile phase pH for the analysis of a lipophilic amine - FAQ
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How do retention and efficiency of asymmetric dimethylarginine ADMA compare using 4um vs 2.o Diamond Hydride columns - AppNote
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How often do I need to do the conditioning procedure for a new Diamond Hydride column - FAQ
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How to get improved retention and peak shape for glutamine glutamic acid and aspartic acid - 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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I heard that there is not a good alternative to HILIC to achieve sufficient retention for some compounds - FAQ
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Injection Technique for Aqueous Samples using Cogent TYPE-C Columns in ANP - 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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Polar and non polar peptides analyzed by LCMS with an Aqueous Normal Phase ANP method - Tips & Suggestions
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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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Retention and or peak shape for citric acid has changed compared to data from a previous HPLC run - Tips & Suggestions
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Should I use methanol as the organic solvent in HPLC when using Aqueous Normal Phase ANP - FAQ
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Since Cogent TYPE-C columns can be used in Reversed Phase or Normal Phase what do you suggest to switch these solvent systems which are not miscible - FAQ
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Since Cogent TYPE-C Silica columns use a transition metal catalyst in production what is the presence of any trace quantity on the surface of the stationary phase- FAQ
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Solving baseline problems in ANP methods with the Cogent Diamond Hydride column - Tips & Suggestions
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The effect of ionic strength of the mobile phase additive for HPLC columns in Aqueous Normal Phase - 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 an Aqueous Normal Phase ANP method will sodium ions interfere with succinate when analyzing sodium succinate - FAQ
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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 is the compatibility of Cogent TYPE-C Silica HPLC columns with UHPLC instruments - FAQ
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What is the maximum salt concentration to use with Cogent TYPE-C HPLC columns with HPLC or LCMS - FAQ
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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 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 am I observing broad split peaks in Aqueous Normal Phase ANP when using acetonitrile and methanol diluents - FAQ
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