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38 Newest Publications about the topic chromatography accessories
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11-Aug-2017 | Darryl Y. C. Kong, Spyridon Gerontas, Ross A. McCluckie, Martin Mewies, David Gruber, Nigel J. Titchener‐Hooker, Journal of Chemical Technology & Biotechnology, 2017
Abstract BACKGROUND Poorly packed chromatography columns are known to reduce drastically the column efficiency and produce broader peaks. Controlled bed compression has been suggested to be a useful approach for solving this problem. Here the relationship between column efficiency and ...
16-Aug-2016 | M. Farooq Wahab; Rasangi M. Wimalasinghe; Yadi Wang; Chandan L. Barhate; Darshan C. Patel; Daniel W. Armstrong, Analytical Chemistry, 2016
Sub-second liquid chromatography in very short packed beds is demonstrated as a broad proof of concept for chiral, achiral, and HILIC separations of biologically important molecules. Superficially porous particles (SPP, 2.7 μm) of different surface chemistries, namely, teicoplanin, cyclofructan, ...
28-Apr-2016 | Xingang Liu; Fajun Tian; Yingying Tian; Yanbing Wu; Fengshou Dong; Jun Xu; Yongquan Zheng, Journal of Agricultural and Food Chemistry, 2016
Five compounds (syringic acid, tricin, acacetin, syringoside, and diosmetin) were isolated from the aerial parts of wild oats (Avena fatua L.) using chromatography columns of silica gel and Sephadex LH-20. Their chemical structures were identified by means of electrospray ionization and ...
14-Mar-2016 | Karel Marschner; Stanislav Musil; Jiří Dědina, Analytical Chemistry, 2016
An experimental setup consisting of a flow injection hydride generator coupled to an atomic fluorescence spectrometer was optimized in order to generate arsanes from tri- and pentavalent inorganic arsenic species (iAsIII, iAsV), monomethylarsonic acid (MAsV), and dimethylarsinic acid (DMAsV) with ...
21-Jan-2016 | Fredrik Elwinger, István Furó, Magnetic Resonance in Chemistry, 2016
A method based on 1H high‐resolution magic angle spinning NMR has been developed for measuring concentration accurately in heterogeneous materials like that of ligands in chromatography media. Ligand concentration is obtained by relating the peak integrals for a butyl ligand in the spectrum of a ...
09-Nov-2015 | Jelle Vos, Erwin R. Kaal, Remco Swart, Martyna Baca, Yvan Vander Heyden, Sebastiaan Eeltink, Journal of Separation Science, 2015
The selectivity and separation efficiency of aqueous size‐exclusion chromatographic separations of intact proteins were assessed for different flow rates, using columns packed with 3 and 5 μm silica particles containing 150 and 290 Å stagnant pores. A mixture of intact proteins with molecular ...
06-Jun-2015 | Fredrik Elwinger, Sergey V. Dvinskikh, István Furó, Magnetic Resonance in Chemistry, 2015
A method for measuring the ligand concentration in heterogeneous materials like chromatography media is described. In this method, 13C single pulse excitation magic angle spinning NMR experiment with broadband 1H decoupling is used to determine the peak integrals for a butyl ligand in the ...
30-Sep-2014 | Bartosz Setner, Magdalena Rudowska, Ewelina Klem, Marek Cebrat, Zbigniew Szewczuk, Journal of Mass Spectrometry, 2014
Improving the sensitivity of detection and fragmentation of peptides to provide reliable sequencing of peptides is an important goal of mass spectrometric analysis. Peptides derivatized by bicyclic quaternary ammonium ionization tags: 1‐azabicyclo[2.2.2]octane (ABCO) or ...
15-Aug-2013 | Dong Wang; Hamza Shakeel; John Lovette; Gary W. Rice; James R. Heflin; Masoud Agah, Analytical Chemistry, 2013
A controllable and high-yield surface functionalization of silicon microchannels using layer-by-layer (LbL) self-assembly of SiO2 nanoparticles (SNPs) is presented. The application of SNPs (45 nm average diameter) coating as a stationary phase for chromatographic separation is also demonstrated ...
24-Jul-2013 | Luminita Moruz; Peter Pichler; Thomas Stranzl; Karl Mechtler; Lukas Käll, Analytical Chemistry, 2013
Reversed-phase liquid chromatography has become the preferred method for separating peptides in most of the mass spectrometry-based proteomics workflows of today. In the way the technique is typically applied, the peptides are released from the chromatography column by the gradual addition of an ...