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No matter where you live or who you work for, you’re likely to encounter one or more of these liquid chromatography (LC) column problems at some point.

Limonin was separated from other components in citrus juice sample matrices by reversed-phase chromatography with ultraviolet detection.

The 42nd International Symposium of High Performance Liquid Phase Separations and Related Techniques (HPLC 2015), chaired by Gérard Hopfgartner was held 21–25 June in Geneva, Switzerland. This instalment covers some of the highlights observed at the symposium including stationary-phase developments, particle technology, and areas of growing application of HPLC. In addition, trends and perspectives on future developments in HPLC culled from the conference are presented.

As flame ionization detection (FID) approaches its 60th anniversary in 2017, this instalment examines the crucial role that it has played and continues to play for all types of gas chromatography (GC). Without FID, the early development of GC would have proceeded more slowly, especially in the petroleum industry and related hydrocarbon application areas.

Click the title above to open the LCGC Asia Pacific September 2015 regular issue, Vol 18, No 3, in an interactive PDF format.

Click the title above to open the LCGC Europe September 2015 regular issue, Vol 28, No 9, in an interactive PDF format.

Click the title above to open the LCGC North America September 2015 regular issue, Vol 33 No 9, in an interactive PDF format.

Ion-mobility spectrometry (IMS) is an analytical technique that provides for the separation of ions in the gas phase. The separation, occuring on a timescale of milliseconds, is based on the differing mobility of ions according to their charge, shape, and size. These characteristics make IMS suitable for coupling with mass spectrometry (MS), to serve in current MS-based workflows for metabolomics and lipidomics. IMS–MS improves peak capacity and signal-to-noise ratios, and it provides more confidence during compound identification or confirmation than conventional analyses.

LCGC TV: Luigi Mondello on the Fundamentals of 2D LC Comprehensive liquid chromatography (LC) is a multidimensional technique that has the potential to increase peak capacity resolution when separating complex mixtures, especially in food analysis.

Seven outdated traditional practices that should not be performed without considering alternative approaches that can improve results, provide lower operation costs, or give faster run times. Instead of working harder, analytical scientists should work smarter. Learn more by clicking through the slideshow.

The 10th Balaton Symposium on High‑Performance Separation Methods will be held on 2–4 September 2015 at the Hotel Azúr in Siófok, Hungary.

Laser irradiation of blue tattoo ink can create toxic byproducts - including hydrogen cyanide (HCN) - according to new research published by scientists at the German Federal Institute for Risk Assessment. Pyrolysis gas chromatography–mass spectrometry (Py–GC–MS) was performed on samples of copper phthalocyanine blue to predict the decomposition products resulting from irradiation, as part of a wider on-going project assessing the safety of tattoo inks.

Researchers revisit arteriovenous profiling - comparing changes in the metabolome of arterial versus venous blood in the diagnosis of disease - using targeted and untargeted LC–MS methods.

The 39th International Symposium on Capillary Chromatography (ISCC) and the 12th GC×GC Symposium held in Fort Worth in Texas, USA, were rousing successes with nearly double the participation of the previous U.S. meetings

Click the title above to open The Column August 21, 2015 Europe & Asia issue, Volume 11, Number 15, in an interactive PDF format.

Click the title above to open The Column August 21, 2015 North American issue, Volume 11, Number 15, in an interactive PDF format.

The United States Food and Drug Administration (FDA) has issued a new guidance document, Analytical Procedures and Method Validation for Drugs and Biologics. The guidance is quite general in nature. Anyone hoping for specific recommendations on topics such as which methods to use will be disappointed. Industry experts say that i really isn’t feasible for the FDA to provide detailed recommendations about analytical methods for biopharmaceuticals, however.

When was the last time you reported your results with an estimate of the error associated with the data? You don’t need to because your method is performing within the levels defined by various agencies and which were confirmed by your validation and your daily QC checks. The person for whom you are producing the data is aware of these tolerances and therefore inherently appreciates the associated precision of the data and can make judgements based on this. Not in the world I work in!

In this new video from LCGC TV, Christian Wachsmuth from the University of Regensburg in Germany compares the performance of different ionization methods for GC–MS in metabolic fingerprinting. He also goes on to talk about how GC–MS could be applied in a clinical setting and what developments are needed for this to happen.

What’s in a Name?

We recently published a study of water quality from 550 water wells in the Barnett Shale of North Texas. Using a suite of analytical techniques, we were able to find new evidence of the potential impact of unconventional natural gas extraction on environmental quality.

A team of researchers in Spain has examined the use of commercial yeast products in the production of white and rosé sparkling wines.

A team of chemists and microbiologists from the University of Leicester has developed a new method of rapidly diagnosing the infection Clostridium difficile (C. difficile).