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 same in HILIC – Tips & Suggestions Read More →
Aqueous Normal Phase ANP defined & compared to Reversed Phase & Normal Phase definitions HPLC Read More →
Are there HPLC columns that could be used to separate both polar and nonpolar compounds in a single run – FAQ Read More →
Buffer concentration can affect ANP retention of acids in HPLC Analyses – Tips & Suggestions 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 and if so is retention for basic compounds reduced because of this – Tech Information Read More →
Do Tanaka Plots for HPLC apply to columns used with Aqueous Normal Phase ANP methods – FAQ Read More →
Eliminate broad split peaks in Aqueous Normal Phase ANP methods and a methanol diluent- Tips & Suggestions Read More →
For the separation of polar intermediates in reversed phase HPLC which C18 column do you recommend – FAQ Read More →
How can I fix poor peak shape for phosphorylated compounds in aqueous normal phase ANP methods – FAQ Read More →
How can I improve accuracy and precision when separating polar compounds with HPLC using Aqueous Normal Phase ANP – FAQ Read More →
How does ammonium fluoride affect HPLC and LCMS data if using Aqueous Normal Phase ANP methods – FAQ Read More →
How to choose a suitable mobile phase additive for negative ionization mode LCMS – Tips & Suggestions Read More →
How to eliminate retention time drift in LCMS with Aqueous Normal Phase ANP methods – Tips & Suggestions Read More →
How to get improved retention and peak shape for glutamine glutamic acid and aspartic acid – Tips & Suggestions Read More →
I heard that there is not a good alternative to HILIC to achieve sufficient retention for some compounds – FAQ Read More →
Injection Technique for Aqueous Samples using Cogent TYPE-C Columns in ANP – Tips & Suggestions Read More →
Is TFA or formic acid better as an acidic mobile phase additive for Cogent TYPE-C columns – FAQ Read More →
LFER studies compared to Log D data in describing the Aqueous Normal Phase ANP retention – Tips & Suggestions Read More →
Mobile Phase recommendation Cogent Diamond Hydride columns for use with serum samples in Aqueous Normal Phase LCMS – Tips & Suggestions Read More →
No need to use a high pH mobile phases for compounds with a high pKa – Tips & Suggestions Read More →
Polar and non polar peptides analyzed by LCMS with an Aqueous Normal Phase ANP method – Tips & Suggestions Read More →