How much higher is the pressure generated on the Cogent 2.o columns than 4um phases – FAQ Read More →
How often do I need to do the conditioning procedure for a new Diamond Hydride column – FAQ Read More →
How similar fittings for chromatography can differ from different brands in HPLC – Tech Information Read More →
How tight should an autosampler vial cap be to prevent push through of the septa during injection – FAQ Read More →
How to calibrate UV-vis and HPLC detectors with NIST traceable solutions below 230nm – Tips & Suggestions Read More →
How to choose a suitable mobile phase additive for negative ionization mode LCMS – Tips & Suggestions Read More →
How to define custom plate measurements for the U-2D Micro-Sample Management System in the Waters Acquity console software – How to Read More →
How to determine concentration of an impurity in HPLC with the relative response factor RRF – How to 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 →
How to handle sparging stones to avoid contamination of mobile phases – Tips & Suggestions Read More →
How to improve peak shapes, retention & carryover for polar compounds with the Cogent Diamond Hydride™ column – Tips & Suggestions Read More →
How to keep the Cogent Diamond Hydride column clean when using blood as a sample – Tips & Suggestions Read More →
How to prepare 10mM ammonium acetate buffer 90:10 in acetonitrile for HPLC and LCMS – Tips & Suggestions Read More →
How to prepare 16mM ammonium acetate buffer 90:10 in acetonitrile for HPLC – Tips & Suggestions Read More →
I am not observing any peaks for succinic acid or alpha-ketoglutarate with the Cogent Diamond Hydride column – 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 →
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 Read More →
I see extra peaks in my chromatography when I am not using the same filter – Tips & Suggestions Read More →
Identify used U-2D inserts for multiple projects or in small sample sets – Tips & Suggestions Read More →
If an analyte is only soluble at basic pH can you use a basic mobile phase for my method – FAQ Read More →
Increasing selectivity and resolution for a xylose and ribose method – Tips & Suggestions Read More →
Injection Technique for Aqueous Samples using Cogent TYPE-C Columns in ANP – Tips & Suggestions Read More →