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Magnetic nanoparticles (m-NPs) are becoming important in analytical chemistry as sorbents in dispersive solid-phase extraction (d-SPE) because they simplify the extraction process and save time as a result of their isolation from the sample matrix by an external magnetic field. Many synthetic processes have been developed to fabricate these nanomaterials and an additional coating step is usually included at the end of the synthesis to improve their stability and to avoid the formation of agglomerates. A wide variety of coatings have been used for this purpose to improve selectivity. This manuscript provides an overview of the different synthesis methods, coatings, and applications of m-NPs as sorbents in d-SPE.

Recent progress in supercritical fluid chromatography (SFC) instrumentation has led to renewed interest in the technique as a powerful tool for chiral and achiral separations of pharmaceutical molecules, for both analytical and preparative purposes. The “green” aspect of the technique and low running costs make SFC technology particularly attractive for preparative chromatography because it considerably reduces the consumption of organic solvents. These factors led to a revised strategy for purification and to a general interest in evaluating possible extensions for the application of packed SFC (pSFC). The results of this extensive evaluation have led to the establishment of SFC platforms for preparative achiral purifications as a standard practice, alongside its use for preparative chiral separations.

What should you do if your retention times drop from one injection to the next? A systematic approach to troubleshooting can help to quickly identify the problem source.

The 40th International Symposium in Capillary Chromatography (ISCC) and 13th GC×GC Symposium will be held at the Palazzo dei Congressi, in Riva del Garda, Italy, from 29 May–3 June 2016.

Our annual review of new liquid chromatography (LC) columns and accessories introduced at Pittcon and throughout the previous year.

Analytica 2016 Thursday Morning Sessions

Analytica 2016 Thursday Afternoon Sessions

A team of researchers from the State Laboratory of Chemo/Biosensing and Chemometrics in China has developed a novel high performance liquid chromatography-diode array detection (HPLC-DAD) method for the identification of six synthetic colours in five beverages.

Jean-Luc Veuthey and Alexandre Grand-Guillaume-Perrenoud reveal the latest developments in supercritical fluid chromatography (SFC) that are bringing the technique back to the limelight.

Experienced gel permeation chromatography/size-exclusion chromatography (GPC/SEC) users know that equilibration of the columns takes much longer than the time needed by the pump to produce a constant flow. An analysis in this phase would clearly yield different results from those achieved after complete equilibration of GPC/SEC columns. Furthermore, false but constant flow rates affect the molar masses derived from a GPC/SEC calibration curve. An internal flow marker can help to increase reproducibility and accuracy of GPC/SEC results.

A glimpse of what can be expected at Analytica 2016.

Trajan Scientific (Melbourne, Australia), which develops medical devices as well as analytical systems such as gas and liquid chromatography columns and sample preparation systems, has acquired the business of LEAP Technologies (Carrboro, North Carolina).

A team of researchers has developed a high‑throughput analysis method for 192 diverse pesticides and 51 environmental contaminants in cattle, swine, and poultry meats. The team used a combination of low-pressure gas chromatography coupled to tandem mass spectrometry (LP)GC–MS–MS and ultrahigh-pressure liquid chromatography coupled to tandem MS in the analysis.

Researchers from the Joint Research Centre of the European Commission have published a case study detailing the characterization of new psychoactive substances using gas chromatography–mass spectrometry, nuclear magnetic resonance, high‑resolution tandem mass-spectrometry, and Raman spectroscopy.

Click the title above to open The Column April 11, 2016 North American issue, Volume 12, Number 6, in an interactive PDF format.

Incognito ponders what it takes to be a “good” analytical chemist. Do you make the grade?

Peter Schoenmakers of the University of Amsterdam has been awarded a prestigious grant worth 2.5 million Euros by the European Research Council to develop new high-performance separation technology. The grant will fund Schoenmakers’s research project “Separation Technology for A Million Peaks” (STAMP).

Click the title above to open The Column April 11, 2016 Europe & Asia issue, Volume 12, Number 6, in an interactive PDF format.

Click the title above to open the LCGC Europe April 2016 Analytica Guide Supplement, Vol 29, No s4, in an interactive PDF format.

Click the title above to open the LCGC Europe April 2016 Chromatography and Sample Preparation Terminology Guide Supplement, Vol 29, No s4, in an interactive PDF format.

A summary of what these techniques can tell us from a qualitative and quantitative perspective

A brief introduction to the articles presented in this supplement

Milton Lee discusses his career path, his influences, and what was involved in launching three commercial analytical instruments.

Click the title above to open the LCGC Europe April 2016 regular issue, Vol 29, No 4, in an interactive PDF format.

Click the title above to open the LCGC North America April 2016 regular issue, Vol 34 No 4, in an interactive PDF format.

Click the title above to open the LCGC North America April 2016 Recent Developments in LC Column Technology Supplement, Vol 34 No s4, in an interactive PDF format.