Determination of Acrylamide in Water by Liquid Chromatography Coupled to Tandem Mass Spectrometry
June 1st 2014An analytical method based on liquid chromatography coupled to tandem mass spectrometry (LC–MS–MS) has been developed for the determination of acrylamide in water. To obtain clean extracts and low detection limits, an activated carbon cartridge was investigated for use in solid-phase extraction (SPE), and extraction conditions such as desorption solvent and elution volume were optimized by a series of experiments. High recoveries (99.1–99.8%) were obtained using the activated carbon solid-phase extraction cartridges with methanol as the eluent. This method could be applied to the quantification of acrylamide in environmental water samples.
Exploring the Possibilities of High-Throughput Sample Preparation
June 1st 2014Sample preparation has often been viewed as the bottleneck in analytical procedures. Surveys have shown that time is typically the most frequent problem area for sample preparation procedures. While newly developed extraction techniques address time, modern chromatography advances are also moving towards faster separations. Based on these considerations, what is high-throughput sample preparation? Do modern extraction methods adequately address the issue of time? How can we address the analytical need for speed?
Superficially Porous Particles: Perspectives, Practices, and Trends
June 1st 2014This review provides an updated overview of the theory behind the success of SPP technology, trends, benefits, and limitations. It also summarizes the latest developments of sub-2-?m SPPs and instrumental constraints associated with their use.
Investigating the Origins of Metabolism
May 29th 2014Scientists at the University of Cambridge (Cambridge, UK) have reconstructed the early conditions of the Earth?s oceans to find that spontaneous chemical reactions could have generated the first biological molecules, before the evolution of organisms or the existence of enzymes.1 The study published in the journal Molecular Systems Biology presents data collected from liquid chromatography?triple quadrupole mass spectrometry (LC–QTOF–MS) suggesting that reactions central to our core metabolism could have spontaneously occurred.
Evaluating the Temperature Shift in Analytical Temperature Rising Elution Fractionation
May 22nd 2014This article presents a new method to evaluate the temperature shift observed in analytical temperature rising elution fractionation (ATREF). The evaluation is based on the dependence of the measured peak temperature as a function of heating rates. Application of the proposed method does not require any knowledge of the fluid circuit characteristics geometry and avoids the use of narrow preparative TREF standards. The results are found to be more accurate than the method that is usually applied.
HPLC 2014 Agilent Technologies Best Poster Award Winners
May 19th 2014The 41st International Symposium on High Performance Liquid Phase Separations and Related Techniques took place from 11?15 May 2014 in New Orleans, USA. One of the highlights of the conference was the poster presentation sessions, which were entered into a competition for the Agilent Technologies Best Poster Award.