Doing HPLC Method Development for Monoclonal Antibody Aggregates? Wait a “SEC”!

By Guest Author: Brian Rivera Contrary to popular belief, size exclusion chromatography (SEC) isn’t straightforward. However, it should be—it’s a non-absorptive separation, right? Just look up an SEC column’s calibration curve, use a standard mobile phase like 1X PBS, and voila, done and done. Of course, that isn’t the case. Continue Reading

The Effects of Changing Column Inner Diameter on LC-MS Applications-Part 3

Part 3: What is the Best Column ID for You? Hi, and welcome back to the third installation of this article series on the effect of changing column inner diameter (ID) in chromatography.  So far, we have taken the test probe, 17-alpha-OH-progesterone, and run a simple linear gradient on the LC-MS Continue Reading

Easy Installation of Phenomenex UHPLC Columns onto Waters® ACQUITY® UPLC® Systems

Installation of Phenomenex column on Acquity system

Did you know that Phenomenex LC columns are a universal fit for all HPLC and UHPLC systems on the market? It’s simple to install Phenomenex UHPLC columns onto Waters® ACQUITY® UPLC® Systems. Here’s how! 1. Disconnect the pre-column heater from the oven. 2. Separated the front and back nuts so Continue Reading

Can an UHPLC Column Have Too Much Efficiency?

Is 100% aqueous stability and unique polar selectivity not enough to convince you to try Luna Omega? Well, here is another equally-compelling reason Guest Author: Dr. Jeff Layne You Can Never Have Too Much Efficiency! The efficiency of a column is a measurement of the amount of band broadening that Continue Reading

A Comparison of Various Core-Shell C18 Phases for Method Development

When performing reversed phase LC separations, there is a natural tendency of method developers to reach for the most commonly used phase—a C18. However, there are so many different variations of C18 phases available to method developers that it often becomes difficult to choose a C18 column that one had Continue Reading

Selectivity for Polar Acids

Guest Author: Dr. Jeff Layne Is super-high efficiency and 100 % aqueous stability not enough to convince you to try Luna® Omega UHPLC Columns? Well then, how about a unique selectivity for polar acidic molecules? Selectivity for Polar Acids is Sweet! Developing robust methods for the analysis of small, polar Continue Reading

The Science of Fidget Spinners

Pardon this spin-terruption, but we have exciting news. Phenomenex has officially been fidget-ized! …Spin-terized? …Spin-sonified? Whatever you want to call it, we have joined the continuing fad of fidget spinners, or as we like to call them, Phegit™ spinners! At first, many were reluctant. Having never spun the spun, it Continue Reading