Category: Reversed Phase Columns FAQ
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Analyte retention decreases with mobile phase water content using the Cogent Bidentate C18 HPLC column has anything happened to the column - Tech Information
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Aqueous Normal Phase ANP defined & compared to Reversed Phase & Normal Phase definitions HPLC
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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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Better separation of two peaks for Reversed Phase RP HPLC - Tips & Suggestions
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Calculate the ligand density of a bonded phase of an HPLC column - How To
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Can I backflush the Cogent column filter for longer in-service life - FAQ
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Can I use a silica or Silica-C guard column with an analytical column of a different phase - FAQ
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Can the Cogent Column Filters replace my HPLC guard columns - FAQ
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Cogent amino HPLC columns designations for reversed or normal phase - Tech Information
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Convert HPLC columns between Reversed Phase and Normal Phase - How to
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Eliminate high background noise using a new Cogent HPLC column - Tips & Suggestions
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Eliminating shoulder peaks in an HPLC method using Cogent RP C18 columns - Tips & Suggestions
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For the separation of polar intermediates in reversed phase HPLC which C18 column do you recommend - FAQ
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How do I connect a guard column to an analytical column - FAQ
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How to condition Cogent RP or HPS or Axis HPLC columns for storage - Tips & Suggestions
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How to improve LOD or detection limits in HPLC - Tips & Suggestions
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How to keep surface treated frits from biofouling - FAQ
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How to minimize HPLC column blockage from most common causes - Tips & Suggestions
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I see a strange saw tooth type of pattern in the UV baseline using my Cogent HPLC column what is it and how can I fix it - FAQ
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Improvement in signal to noise in LCMS with an ANP method - Tips & Suggestions
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Is the Cogent Column Filter compatible with a 2.1mm ID column - FAQ
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Method development tip for maleic hydrazide - Tips & Suggestions
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Negative Baselines in HPLC at 214nm - Tips & Suggestions
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Obtain a flat baseline in a gradient method without using blank subtraction - How to
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Peak area decreases with increasing flow rate - FAQ
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Performance goals or objectives for a routine HPLC method - Tips & Suggestions
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Policy on verifying a new Cogent HPLC column performance - Tips & Suggestions
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Random shifting of retention times in HPLC chromatograms - Tips & Suggestions
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Sample concentration changes can effect retention time in HPLC - Primer
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Storing the HPLC column supplied in the HSQ kit - How To
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The common names of HPLC column diameters - Primer
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Theoretical plate estimates indicates column condition - Primer
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What are the typical flow rates recommended by HPLC column companies to start with for various column ID - Primer
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What determines the retention of a molecule in reversed phase HPLC - FAQ
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What is a base deactivated HPLC Column - FAQ
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What is Post Time in an HPLC gradient method - Primer
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What is the bonded phase of the Cogent PFP HPLC column and for which applications is it used - FAQ
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What is the chemical structure of the ligand in the Cogent DIOL HPLC stationary phase - 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 is the pilot length or dimension X depth for end fittings uses to connect HPLC columns - FAQ
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What is the purpose of back flushing an HPLC column and will it damage it - FAQ
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What is the purpose of different bonded phases using Cogent TYPE-C Silica - FAQ
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What type of fitting is best to use with the Cogent HPLC and LCMS columns - FAQ
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Which HPLC column internal diameter should I use for LCMS - FAQ
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Why do I see large intermittent pressure spikes in HPLC runs and can it be a defective column - FAQ
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Why does the metal content of a silica particle contribute to the peak shape of my chromatogram in HPLC - FAQ
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Will phosphates precipitate in an HPLC column - FAQ
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