Analyze phosphorylated compounds with the Cogent Diamond Hydride column – Tips & Suggestions Read More →
Analyzing metformin in plasma samples how do I obtain reproducible results and peak shapes – FAQ Read More →
Aqueous Normal Phase ANP ballistic gradients compared to HILIC in HPLC or LCMS – Tips & Suggestions Read More →
Are the Cogent TYPE-C Silica based stationary phases available for sale as bulk materials – FAQ Read More →
Are there HPLC columns that could be used to separate both polar and nonpolar compounds in a single run – FAQ Read More →
Can I use a silica or Silica-C guard column with an analytical column of a different phase – FAQ Read More →
Can I use the Cogent Diamond Hydride column without mobile phase additives like formic acid – FAQ Read More →
Can Reversed Phase and ANP mechanisms operate with the same effect at the same time – FAQ Read More →
Do Cogent TYPE-C Silica Columns have a partial positive charge? If so, is retention for basic compounds reduced because of this? Read More →
Do Tanaka Plots for HPLC apply to columns used with Aqueous Normal Phase ANP methods – FAQ Read More →
High molecular weight compounds that won’t retain on Cogent Diamond Hydride column try Cogent Bidentate C8 300 – Tips & Suggestions Read More →
High pressure develops after flushing a Cogent Diamond Hydride column with acetonitrile cause and solution – FAQ Read More →
How can I fix poor peak shape for phosphorylated compounds in Aqueous Normal Phase ANP methods – FAQ Read More →
How do I convert Cogent TYPE-C columns to normal phase after use in reversed phase? – FAQ Read More →
How often do I need to do the conditioning procedure for a new Diamond Hydride column – FAQ Read More →
I heard that there is not a good alternative to HILIC to achieve sufficient retention for some compounds – FAQ Read More →
I see a strange sawtooth pattern in the UV baseline using my Cogent HPLC column what is it and how can I fix it – FAQ Read More →
Is TFA or formic acid better as an acidic mobile phase additive for Cogent TYPE-C columns – FAQ Read More →
Is TYPE-C Silica a high purity support and have a low metal content silica like Type B silica – FAQ Read More →
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 Read More →