All News

pigments.jpg

Luigi Mondello spoke to The Column about his group’s research into characterizing pigments in bell peppers using offline multidimensional supercritical fluid chromatography (SFC) combined with reversed-phase liquid chromatography (LC).

figure 11488894337436.png

Raw data is a term that is used in both good manufacturing practice (GMP) and good laboratory practice (GLP) laboratories but it can create misunderstanding. What exactly does raw data mean and what electronic records are within the scope of the term?

figure 11488896962202.png

The carotenoid test allows one to build a simple classification map of stationary phases used in reversed‑phase liquid chromatography, on the basis of the shape recognition (plotted on the x axis), the polar surface activity (plotted on the y axis), and the phase hydrophobicity (related by the bubble size).

figure 11486467668085.jpg

Gel permeation chromatography/size-exclusion chromatography (GPC/SEC) is used to determine molar mass averages and the complete molar mass distribution with just one injection. This is possible because GPC/SEC is a fractionating technique. The fractionation power allows the higher molar mass fraction to be characterized and more about low molar mass compounds such as oligomers, additives, or residual educts to be learned.

Bruker (Bremen, Germany) has announced the acquisition of SCiLS GmbH in Bremen, Germany. Founded as a spin‑off from the University of Bremen, SCiLS develops software tools such as statistical analysis software, sophisticated visualization viewers, and secure cloud-based services for collaborative interpretation of complex mass spectrometry imaging (MSI) data sets. Currently, 95% of all MSI data is acquired by label-free MALDI imaging systems.

Agilent Technologies Inc. (Santa Clara, California, USA) and Multiplicom N.V. (Niel, Belgium) have announced that they have signed a definitive agreement for Agilent to acquire Multiplicom, a European diagnostics company involved in genetic testing. Agilent is acquiring Multiplicom for approximately €68 million in cash.

This time I’m going to be looking at how to get the most from your GC–MS (Gas Chromatography–Mass Spectrometry) system, and I intend to keep things as simple as possible, however I also make no apology in the fact that some of the concepts may be beyond your current understanding. My intention here is to explain some of the basics so that you will be able to use your instrumentation to best effect.

Laura_web.jpg

John Dolan’s final LCGC column will appear in October. We are sad to see him go! Fortunately, we have just the person to follow in his footsteps: Dwight Stoll.

For the most part, we are still instructing undergraduate students in the same way as when I went to school, and I think this is a disservice to the students and to the nature of chemistry. No wonder chemistry programs have trouble attracting students compared to other science disciplines, like biology and psychology. Students will take general chemistry, but they cannot see where it may lead. I want to change that.

Pittcon.jpg

A glimpse of what’s on offer for chromatographers at Pittcon 2017, which will be held from 5–9 March 2017 at McCormick Place in Chicago, Illinois, USA.

figure 11484821873124.jpg

Separation scientists may seek an optimum spot between chromatographic performance required to obtain sufficient results quality, and the time and resources needed to do so. This instalment of “GC Connections” examines the factors that control peak resolution - one of the main drivers of separation quality - and how chromatographers can use this information to find an optimum between time, cost, and performance.

table 1 L1484826439650.jpg

This instalment describes several commonly used microextraction sample preparation techniques and their applications to forensic toxicology analysis. Solid-phase microextraction (SPME), microextraction by packed sorbent (MEPS), and different types of liquid-based microextraction (LPME), including single‑drop microextraction (SDME), hollow-fibre supported LPME, three-phase LPME, and dispersive liquid–liquid microextraction (DLLME), are discussed. Examples of application of these techniques to determine illicit drugs and drugs of abuse from various biological specimens are provided as well.

Agilent Technologies has announced that Shane Snyder, Ph.D., has received an Agilent Thought Leader Award in recognition of his research in water analysis, and the exploration of new approaches to determine the quality and safety of drinking water.