Selecting a GC packed column for a specific analysis can be daunting because there are so many variations possible. In this post, we focus on the following solid supports: diatomaceous earth (DiatoSorb W, Silcoport W, and Chromosorb P), graphitized carbon black (CarboBlack B and CarboBlack C), and amorphous silica (Res-Sil B and Res-Sil C).
Customers attempting to develop GC methods for lower detection limits of fixed/permanent gases often discover low-level oxygen analysis is more challenging than expected. In this post, I list several possible issues as to why analyzing for low levels of oxygen can be difficult.
If you are using mobile phase that contains salts or, generally, any components that are weighed out foar its preparation, you will need to filter the solution before using with HPLC or UHPLC. The most common type of filtration is…
Well, it might be. In the early days of HPLC, THF was commonly used as a mobile phase solvent. It has eluting strength similar to acetonitrile, but just slightly stronger. Since it technically is an ether and is very miscible…
Enjoy the tip!*I am often asked for QuEChERS product recommendations. Usually the request is something like, “I need to test pesticides in _____” and that blank can be just about anything…sometimes not even food. Unless it is something I have…
I think we all have experienced various syringe issues at one time or another, and of course, problems seem to occur at the worst times. Hopefully this post will help you quickly correct two of the most common issues we…
