The effect of ionic strength of the mobile phase additive for HPLC columns in Aqueous Normal Phase – Tips & Suggestions Read More →
Injection Technique for Aqueous Samples using Cogent TYPE-C Columns in ANP – Tips & Suggestions Read More →
Can Reversed Phase and ANP mechanisms operate with the same effect at the same time – FAQ Read More →
The best way to avoid with ion suppression issues in LCMS if you need to use an ion-pair agent – Primer Read More →
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 Read More →
How to choose a suitable mobile phase additive for negative ionization mode LCMS – Tips & Suggestions Read More →
Why are ionized polar compounds generally better retained in Aqueous Normal Phase ANP HPLC – 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 →
Two gradients to use for analysis of hydrophilic and or hydrophobic molecules in the same Aqueous Normal Phase ANP method – Tips & Suggestions Read More →
How to keep the Cogent Diamond Hydride column clean when using blood as a sample – Tips & Suggestions Read More →
How can I improve accuracy and precision when separating polar compounds with HPLC using Aqueous Normal Phase ANP – FAQ Read More →
Type of gradient to use for analysis of hydrophilic and hydrophobic molecules in the same HPLC or LCMS run – Tips & Suggestions Read More →
How to get improved retention and peak shape for glutamine glutamic acid and aspartic acid – Tips & Suggestions Read More →
Determining Efficiency of HPLC methods comparing 4um v 2.o HPLC columns – Tips & Suggestions Read More →
What is the difference between weak and strong cation exchange for Ion Exchange columns – FAQ Read More →
How can I fix poor peak shape for phosphorylated compounds in aqueous normal phase ANP methods – FAQ Read More →
What is the compatibility of Cogent TYPE-C Silica HPLC columns with UHPLC instruments – FAQ Read More →
How does ammonium fluoride affect HPLC and LCMS data if using Aqueous Normal Phase ANP methods – 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 →