Feb 06, 2018
I'm often asked to help with the development of column "screening" platforms and automated development systems. While this covers a large amount of analytical science there are some common elements to this type of approach, perhaps the most important of which is column selection. Unsurprising given that "selectivity" is the most powerful tool we have in chromatography and we all know that the best way to optimize selectivity is to choose the most appropriate stationary phase.
Jan 30, 2018
I always think of a conference presentation to be like a rock band concert. Sure, the band is going to play some of their biggest hits, but they also want to propagate their new stuff. More importantly, they want to put on a show so that people are entertained. I do think there should be more emphasis on entertaining the audience during oral presentations.
Jan 09, 2018
Sometimes troubleshooting a separation can rely upon the end user spotting subtle clues within the chromatogram, and at other times the visual signs can be much more obvious. To start the New Year, I wanted to share some of the most common issues that we see with peak shapes in gas chromatography in the hope that if you spot some of these in your own work, you may be able to intercept problems and deal with them more effectively.
Jan 03, 2018
E-Separation Solutions
Two things were surprising about some recent research we reported. First, with regard to chemically impaired groundwater quality, it may not always be the chemicals that are most worrisome for human health impacts. Second, the primary methodology we used in that work for microorganism identification, matrix-assisted laser desorption–ionization mass spectrometry (MALDI-MS), is a vastly underappreciated tool, especially outside the clinical realm in areas such as environmental monitoring.
Dec 11, 2017
The LCGC Blog
It’s very easy to be comfortable with what you have. It’s only when we realize what could be, that we become interested in changing things.
Dec 04, 2017
When I want to hear some humorous stories, there are few friends in the instrument manufacturing and sales business I can contact. If I ask them about their recent experiences with the cannabis industry, their stories will cover topics ranging from instruments purchased using duffel bags of cash (cue images of large men in suits and sunglasses packing heat) to recent college graduates who cleared $25 million in their first year of business selling cannabis butter (cue images of large men at breakfast laughing uncontrollably).
Nov 07, 2017
I hear the words “struggling for sensitivity” so often when speaking to folks using LC–MS for bioanalysis, environmental analysis, metabolomics, proteomics, and a host of other applications where target analytes are present at low concentrations in complex matrices. We spend fortunes on MS/MS instruments to increase specificity of detection in order to improve sensitivity. Some of us go to great lengths to optimize sample extraction and HPLC conditions in order to minimize matrix suppression effects and improve specificity and hence sensitivity.
Oct 30, 2017
The presence of capable students and researchers, each with a technical niche to offer, prepares us for future opportunities. On top of that structure, we also aim to maintain this mindset for our instrument selection before beginning projects. The installment of core labs at UT Arlington (, making a wide range of instruments available to all research groups, has allowed our students to brainstorm about which instrument is the most appropriate for a specific analysis rather than how to make a measurement work with a given instrument.
Oct 05, 2017
Data validity and a thorough understanding of the results that we produce should be of great interest to us all. Here's why.
Sep 27, 2017
Internal standards (IS) are commonly incorporated into quantitative methods to increase accuracy and precision. An IS is a compound that is different than the analyte of interest, has similar physicochemical properties to the analyte, and is added to samples, calibration standards, and quality control samples in a known quantity. It should not be present in the sample, it should be available in high purity, and it should be easily differentiable from the analyte of interest.
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