Category: Diamond Hydride FAQ
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Analysis of Litchi seed extracts - AppNote
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Analyze phosphorylated compounds with the Cogent Diamond Hydride column - Tips & Suggestions
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Aqueous Normal Phase ANP and how can it is useful for polar compounds - Tech Information
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Aqueous Normal Phase ANP ballistic gradients compared to same in HILIC - Tips & Suggestions
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Aqueous Normal Phase ANP HPLC what is it - FAQ
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Aqueous Normal Phase ANP solvent strength order - FAQ
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Are Cogent 2.o HPLC columns compatible with Agilent 1290 Infinity II instruments - FAQ
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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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Basic compound adsorption study with time dependence in vials - AppNote
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Basic compound functional group dependent adsorption study in RSA autosampler vials - AppNote
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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 Acetone as a mobile phase solvent in Aqueous Normal Phase ANP - FAQ
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Can I use ion pairing reagents with the Cogent Diamond Hydride HPLC column - FAQ
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Can I use of the Cogent Diamond Hydride HPLC column above pH 7 in HPLC - FAQ
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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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Can I use triethylamine TEA with Cogent Diamond Hydride columns - FAQ
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Can you measure EDTA plasma samples for creatine & creatinine - FAQ
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Causes of high baseline noise with Cogent Diamond Hydride HPLC column - Tips & Suggestions
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Choose an appropriate guard column when using a Cogent TYPE-C HPLC column - How To
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Cleaning Cogent TYPE-C silica based HPLC columns - Tips & Suggestions
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Cogent silica hydride HPLC columns by order of hydrophobicity - 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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Fosetyl Aluminum analysis by HPLC - Tips & Suggestions
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Fosetyl aluminum analysis by Reversed Phase HPLC - 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 get separation of tartaric and malic acid in a complex mixture? - 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 can I separate methacrylic acid and dodecyl benzene sulfonic acid - 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 back flush and wash an HPLC column for reuse - Tips & Suggestions
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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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How to separate phospholipids with HPLC - 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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Method development tip for maleic hydrazide - 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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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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Percentage of acid needed in Aqueous Normal Phase ANP methods - 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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Solving baseline problems in Aqueous Normal Phase ANP methods - Tips & Suggestions
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Store and maintain Cogent Diamond Hydride HPLC columns - How To
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Suggestions for HPLC method development with silica hydride columns - 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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Tizanidine HCl HPLC Method transferred to near UHPLC - AppNote
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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 inorganic buffers for HPLC UV analysis of citric acid - 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 do You suggest for an internal standard in glucosamine LCMS Analysis - FAQ
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What is a master batch for Cogent HPLC columns - FAQ
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What is the carbon load of the Cogent Diamond Hydride HPLC column - 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 largest Internal Diameter for Cogent TYPE-C prep columns - 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 is the maximum temperature for Cogent Diamond Hydride HPLC columns - FAQ
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What is the recommended pH range for Cogent Diamond Hydride HPLC columns - 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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Why am I seeing two peaks for quaternium15 Dowicil-75 in LCMS - FAQ
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Why am I seeing two peaks for quaternium-15 or Dowicil-75 in my LCMS data - FAQ
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Why do I have lower than normal back pressure with Cogent Diamond Hydride HPLC columns - FAQ
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Why doesn't triphenylamine a tertiary amine retain in Aqueous Normal Phase ANP - FAQ
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Working with ammonium acetate and LCMS requires attention to cleaning - Tips & Suggestions
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