All News

Today, I learned of the passing of a dear friend and a valued collaborator, Walton Caldwell, who founded the company Princeton Chromatography in 1994.

Is it time to update your working practices?

Postnova Analytics has announced a joint collaboration with the Department of Biosciences at the University of Helsinki in Finland, to use AF4 for the purification of halophilic viruses.

Restek has partnered with the Girl Scouts in the Heart of Pennsylvania to host three STEM expos with the aim of building basic science skills in girls.

Peak Scientific has given a guided tour of their manufacturing headquarters in Inchinnan, Scotland, to his Royal Highness The Duke of Gloucester to mark the company’s 20th anniversary

Researchers from the University of Almería, in Almería, Spain, have developed a nontargeted metabolomic approach to differentiate organic and non-organic tomato crops using HPLC–HRAMS.

Researchers from the Université de Pau et des Pays de l’Adour, in France, have developed a large volume injection method using a programmed temperature vaporization (PTV) injector for the simultaneous determination of mercury, tin, and lead at ultra-trace levels in natural waters using GC–ICP-MS.

Click the title above to open The Column May 2018 North American issue, Volume 14, Number 5, in an interactive PDF format.

Click the title above to open The Column May 2018 Europe & Asia issue, Volume 14, Number 5, in an interactive PDF format.

One of the initiatives that the SCSC oversees is the nomination process and awarding of the Satinder Ahuja Award for Young Investigators in Separation Science. Where are all of the young investigators in separation science? Certainly, those that have been honored to date have been worthy; however, there must be more eligible parties out there.

A bad connection between an LC column and the rest of the system can ruin a good separation. New technologies may improve the quality of these connections and the likelihood of establishing a good connection in the first place. Understanding the issues will help you choose the best option for you.

We present our annual review of new developments in the field of gas chromatography, which this year includes eight new GC and GC–MS laboratory benchtop systems as well as numerous new columns and accessories.

Good maintenance of the GC inlet can prevent a host of problems fromcompromising the quality of your results.

Integration is the heart of the chromatographic process and is subject to regulatory scrutiny. What should be done to control integration and interpretation of the chromatographic runs?

There have been exciting recent advances in ICP-MS instrumentation, such as the development of magnetic sector ICP-MS, multicollector ICP-MS, time-of-flight ICP-MS, and triple-quadrupole ICP-MS, as well as developments in the coupling of laser ablation (LA) and laser-induced breakdown spectroscopy (LIBS) to ICP-MS. This article surveys these developments and looks to the future.

Matrix-assisted laser desorption–ionization (MALDI) imaging mass spectrometry allows direct, in situ, label-free measurement of proteins, peptides, lipids, small-molecule drugs and their metabolites, and other chemicals in tissues. In a range of applications, the unique information generated by MALDI imaging can make a significant contribution to understanding factors such as molecular and metabolic mechanisms and the transport and localization of compounds or metabolites with human, animal, or plant species.

Recent advances have significantly improved the performance of capillary electrophoresis–mass spectrometry (CE–MS) for the profiling of polar and charged metabolites in volume-restricted or mass-limited biological samples. Here, those advances are discussed, and attention is also devoted to various technical aspects that still need to be addressed.

For lipid-containing food products like mayonnaise, determining nonvolatile lipid oxidation products, the precursor compounds for rancidity, makes it possible to predict product shelf life at an earlier stage in product development. A method based on normal-phase liquid chromatography with atmospheric pressure photoionization-mass spectrometry (LC–APPI-MS) was developed for this purpose.

A novel automated ultratrace gas chromatography–mass spectrometry (GC–MS) method has been developed that quantitates the eight toxaphene Parlar congeners designated in U.S. Environmental Protection Agency Method 8276. This method, combined with an efficient extraction, cleanup, and fractionation technique, makes is possible to extend instrument detection limits to the low parts-per-trillion concentration level for these toxaphene Parlar congeners.

Comprehensive two-dimensional liquid chromatography (LC×LC) is a powerful technique for separating highly complex samples. However, the proliferation of this technique is hindered by a range of challenges, including the possible impact of the additional separation on the detection sensitivity, concerns that mobile phase incompatibility problems will limit the applicability, and the complexity of the system and associated method development costs. This article addresses these issues and describes how modern modulators and software tools are overcoming the barriers associated with this technique.

The biomimetic gradient retention time measurements on C18, immobilized artificial membrane (IAM), human serum albumin (HSA), and acid-glycoprotein (AGP) stationary phases can be used to characterize compounds partitioning into phospholipids and proteins. The data obtained can then be used in equations to estimate the in vivo plasmaÐtissue distribution of the compounds measured. The plasma protein binding, brain tissue binding, and in vivo drug efficiency can also be calculated using the biomimetic chromatographic data.

With so many choices for fittings to use in making connections in my liquid chromatography (LC) system, how do I know which ones are the right ones for my application?

This yearly report on new products introduced at Pittcon (or in the preceding year) covers sample preparation instrumentation, supplies, and accessories.

John Hinshaw presents his annual review of new developments in the field of gas chromatography seen at Pittcon and other venues in the past 12 months.

We explore the careers and achievements of the winners of LCGC’s 11th annual awards: Ronald E. Majors and Zachary S. Breitbach.

An excerpt from LCGC’s e-learning tutorial on inlet maintenance at CHROMacademy.com

The 2018 Sample Prep Summer Course will take place in Chania-Crete, Greece, on 22–24 August 2018.

Click the title above to open the LCGC Europe May 2018 regular issue, Vol 31, No 5, in an interactive PDF format.