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Wyatt TechnologyReversed-phase chromatography represents one of the most popular applications of high performance liquid chromatography (HPLC), with particular importance for protein characterization. Because elution depends on the hydrophobicity of the sample, it is generally impossible to identify the separated products on the basis of their elution time (volume). Frequently, each eluted fraction must be isolated further and analyzed with other techniques to gain some understanding of the molecular behaviour of the protein.

Students who have an internship on their resume, and are seeking jobs in a particular sector, are doing so with an informed opinion. While an internship comes in many forms, that real-world experience has provided a clear touchstone of understanding of what it would be like to work in a given sector.

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Few fruits are as notorious as the Durian fruit. Native to Southeast Asia but fast becoming available around the globe, these fruits hold the unsavoury title of “the world’s smelliest fruit”. The compounds responsible for such a complex and at times difficult to stomach aroma have intrigued scientists for decades, but until recently the data relating to those chemicals was inconsistent.

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The implementation of the FSMA (Food Safety Modernization Act) and the continued globalization of the food supply have increased the need for improved analytical methods for quality and safety testing. Food safety and quality requirements are increasingly stringent, as are consumer expectations. In addition to new methods, the industry continues to look for improvements in laboratory productivity and new ways to reduce costs. These trends extend to dietary supplements and natural products. This article discusses the current state of efforts to modernize US Pharmacopeia (USP) compendial methods to take advantage of new chromatography technology, including the use of “allowable adjustments”.

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Meeting Preview: RAFA 2017

A preview of RAFA 2017, which will be held 7–10 November 2017 in Prague, Czech Republic.

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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).

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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?

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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).

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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.