Restoring the initial results with a method for analyzing AMP ADP ATP UDP and GPT in biological extracts – Tips & Suggestions Read More →
Retention and or peak shape for citric acid has changed compared to data from a previous HPLC run – Tips & Suggestions Read More →
Should I use methanol as the organic solvent in HPLC when using Aqueous Normal Phase ANP – FAQ Read More →
Silicone rubber in septa for autosampler vials vary in the way it is made – Tech Information 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 →
Solving baseline problems in ANP methods with the Cogent Diamond Hydride column – Tips & Suggestions Read More →
Spurious peaks from nylon syringe filters with DI water using electrochemical detection can be avoided – Tips & Suggestions Read More →
Suggestion for separation of phenylephrine HCl acetaminophen and dextromethorphan – Tips & Suggestions 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 →
The effect of ionic strength of the mobile phase additive for HPLC columns in Aqueous Normal Phase – Tips & Suggestions Read More →
To obtain greater sensitivity than Na adducts for sugars could you add ammonia NH4 instead – FAQ Read More →
Troubleshooting problems with poor HPLC runs before the examining the column – Tips & Suggestions 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 →
Type of gradient to use for analysis of hydrophilic and hydrophobic molecules in the same HPLC or LCMS run – Tips & Suggestions Read More →
Use a low concentration of salt in your mobile phase to avoid ion suppression and build up on your inlet source – Tips & Suggestions Read More →
Using a Constant Pressure Method on two Instruments Producing Different Flow Rates- Tips & Suggestions Read More →
Using ammonium acetate or formate in an acetonitrile based HPLC mobile phase for Aqueous Normal Phase ANP – Tips & Suggestions Read More →
Using ammonium acetate or triethylamine TEA with Cogent HPLC columns – Tips & Suggestions Read More →