Using triethylamine TEA in Aqueous Normal Phase ANP methods for simple sugars – Tips & Suggestions Read More →
Using two HPLC columns together in a tandem separation for polar and non polar retention – Tips & Suggestions Read More →
What are the size and materials of the mobile phase delivery bottle caps and O-rings – FAQ Read More →
What is the maximum concentration of ammonium fluoride to use in a mobile phase to avoid column damage – Tips & Suggestions Read More →
What is the maximum salt concentration to use with Cogent TYPE-C HPLC columns with HPLC or LCMS – FAQ Read More →
What is the pH range of 316 stainless steel laboratory tubing fittings and sparging stones – FAQ Read More →
What is the purpose of using isopropanol IPA as part of the mobile phase solvent in ANP methods – FAQ Read More →
What problems can occur when using a dedicated Reversed Phase HPLC instrument for an Aqueous Normal Phase ANP method for the first time – FAQ Read More →
When I run gradients on my HPLC and switch from one gradient to another my baseline shows as negative and if I auto zero it becomes positive for the remainder of the run but when I start again it is negative – Primer Read More →
Which acid or base additive should I choose for positive or negative ion mode in LC-MS – FAQ Read More →
Which column do you suggest for Cocaine & metabolite Ecognin separation – Tips & Suggestions Read More →
Why am I observing broad split peaks in Aqueous Normal Phase ANP when using acetonitrile and methanol diluents – FAQ Read More →
Why do I have lower than normal back pressure with Cogent Diamond Hydride HPLC columns – FAQ Read More →
Will TFA permanently alter retention / selectivity of the Cogent TYPE-C silica columns – FAQ Read More →
Your filter sparging stones with stems are listed as 1/8 or 1/16 ID shouldn’t this be OD – FAQ Read More →