HPLC @ separationsNOW

The HPLC channel covers all techniques used for the separation of liquids.

This includes multidimensional techniques (e.g. LCxLC) and hyphenated techniques (e.g. LC-MS). Also included are capillary LC, nano LC, SEC (Size Exclusion Chromatography) and GPC (Gel Permeation Chromatography).

Gas Chromatography

Monthly Highlight

Last Month's Most Accessed Feature: Design and degradation in drug determination

There is a need for new analytical methods for the anticancer drug sorafenib, which are suitable both for the compound itself and its degradation products. Researchers from Panjab University in India used an analytical quality by design approach (AQbD), including a face-centred cubic experimental design, to devise a new HPLC method for sorafenib and its degradation products.

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2018 Free Sample Issues of Key Analytical Science Journals

The 2018 free sample issues of all our Analytical Chemistry journals are now available!

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Advertorial Feature

Shimadzu Europa
Automatic Pre-Column Derivatization of Amino Acids by LC

thumbnail image: <font size=3>Shimadzu Europa</font><br />Automatic Pre-Column Derivatization of Amino Acids by LC

Amino acids as building blocks of peptides and proteins are present in animals, humans and plants. The analysis of amino acids is of essential significance in several areas including food science, clinical diagnostic and pharmaceutical products research. The classical LC determination of amino acids is performed by the sample pretreatment including pre-column as well as post-column derivatization increasing or even enabling spectroscopic detection.

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Ezines

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Cataloguing Casanova’s contagions with proteomics

Ryan De Vooght-Johnson

Jun 13, 2019

thumbnail image: Cataloguing Casanovas contagions with proteomics

Modern analytical techniques enable information to be recovered about the diseases contracted by historical figures. A multi-centre scientific team sampled the original manuscript of Casanova’s ‘Memoirs’, extracting proteins, hydrolysing them and examining the resulting peptides by LC-MS, looking for any evidence of gonorrhoea bacteria or other harmful micro-organisms.

The theoretical prediction of relative HPLC retention times is challenging, but can be accomplished using quantitative structure-retention relationships (QSRR). An international team of scientists used the hydrophobic subtraction model (HSM) and QSRR to predict reversed-phase HPLC retention times.

Convergence chromatography catches compost antibiotics

Ryan De Vooght-Johnson

May 30, 2019

thumbnail image: Convergence chromatography catches compost antibiotics

Composting is an important process for horticulture and some farms, but compost containing animal manure may be contaminated by antibiotic residues. Researchers from four Chinese institutions  developed a method for measuring 20 antibiotics using ultraperformance convergence chromatography.

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Education

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The Basics of Micro-LC

Thorsten Teutenberg, Terence Hetzel, Denise Loeker, Juri Leonhardt

Apr 3, 2018

thumbnail image: The Basics of Micro-LC

For some time “sustainable processes” has been the phrase on everyone’s lips. As far as analytical labs are concerned there are many possibilities for saving energy or rather for using resources more efficiently. Besides the real “energy guzzlers” such as extractors and safety cabinets, complex analysis apparatus has to be subjected to critical system checks, too.

Selected key technologies of the analytical science industry are discussed by Steve Down with reference to burgeoning application areas and the scope for future improvements.

Ion source pressure plays a significant role in the process of ionization and the subsequent ion transmission inside a mass spectrometer. Pressurizing the ion source to a gas pressure greater than atmospheric pressure is a relatively new approach that aims to further improve the performance of atmospheric pressure ionization sources. A brief review on the development of super-atmospheric pressure ion sources, including high-pressure electrospray, field desorption and superheated ESI, and the strategies to...

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Journals

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The Journal of Mass Spectrometry (JMS) publishes papers on a broad range of topics of interest to scientists working in both fundamental and applied areas involving the study of gaseous ions.

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