Showing 1-30 of 471 results for "ion-exchange-column"
Jorge Cesar Masini
Analytical and bioanalytical chemistry, 408(5), 1445-1452 (2015-12-18)
Since sequential injection chromatography (SIC) emerged in 2003, it has been used for separation of small molecules in diverse samples, but separations of high molar mass compounds such as proteins have not yet been described. In the present work a...
Mohamed Dawoud
Drug development and industrial pharmacy, 41(1), 156-162 (2013-10-30)
Due to their small particle size, colloidal fat emulsions are suitable for intravenous administration. In order to obtain information on their potential in vivo performance, it is important to find a simple and effective in vitro assay to evaluate the...
Kiran Kumar Solingapuram Sai et al.
Applied radiation and isotopes : including data, instrumentation and methods for use in agriculture, industry and medicine, 129, 57-61 (2017-08-15)
We automated radiochemical synthesis of 1-[
István Ilisz et al.
Journal of chromatography. A, 1363, 169-177 (2014-07-20)
Two chiral stationary phases containing a quinine- or a quinidine-based zwitterionic ion-exchanger as chiral selector were applied for the enantioseparation of 27 unusual cyclic secondary α-amino acids. The effects of the nature and concentration of the bulk solvent, the acid...
F R Silva et al.
Applied biochemistry and biotechnology, 84-86, 1063-1078 (2000-06-13)
The use of adsorption columns packed with ion-exchange resins for recovering, concentrating and purifying proteins is now widespread. The present work consists of a study on the dynamic behavior of adsorption columns that uses two kinds of adsorbents: a cationic...
D Sýkora et al.
Journal of chromatography. A, 852(1), 297-304 (1999-09-10)
Porous monolithic columns have been prepared by the direct free radical copolymerization of glycidyl methacrylate and ethylene dimethacrylate within the confines of a 50x8 mm I.D. chromatographic column in the presence of porogens. The epoxide groups of these monoliths were...
Tsutomu Arakawa et al.
Journal of biochemical and biophysical methods, 70(3), 493-498 (2007-01-11)
In general, proteins bind to affinity or ion-exchange columns at low salt concentrations, and the bound proteins are eluted by raising the salt concentration, changing the solvent pH, or adding competing ligands. Blue-Sepharose is often used to remove bovine serum...
Zhengjin Jiang et al.
Journal of separation science, 31(15), 2774-2783 (2008-07-31)
This paper describes the fabrication of RP/ion-exchange mixed-mode monolithic materials for capillary LC. Following deactivation of the capillary surface with 3-(trimethoxysilyl)propyl methacrylate (gamma-MAPS), monoliths were formed by copolymerisation of pentaerythritol diacrylate monostearate (PEDAS), 2-sulphoethyl methacrylate (SEMA) with/without ethylene glycol dimethacrylate...
Determination of methotrexate in plasma by on-column concentration and ion-exchange chromatography
Lankelma J and Poppe H
Journal of Chromatography A, 149(5), 587-598 (1978)
Elisabeth Schmoeger et al.
Journal of chromatography. A, 1216(48), 8460-8469 (2009-10-27)
Refolding of proteins must be performed under very dilute conditions to overcome the competing aggregation reaction, which has a high reaction order. Refolding on a chromatography column partially prevents formation of the intermediate form prone to aggregation. A chromatographic refolding...
E Mallat et al.
Journal of chromatography. A, 823(1-2), 129-136 (1998-11-18)
The quantitative trace determination of glyphosate and its major metabolite, aminophosphonic acid (AMPA) in natural waters was achieved by means of ion-exchange chromatography. Fifty ml of natural water sample was preconcentrated by a two-step procedure: first the sample was percolated...
E Westman et al.
Analytical biochemistry, 166(1), 158-171 (1987-10-01)
Separation of DNA restriction fragments by FPLC ion-exchange chromatography on Mono Q and Mono P columns was investigated. The columns were found to be particularly suitable for the separation of fragments up to 500-600 bp long. Larger fragments can also...
T N Ferraro et al.
Analytical biochemistry, 143(1), 82-94 (1984-11-15)
A highly resolving triple-column amino acid analyzer with fluorometric detection is described. The reliability of this technique was evaluated and it was used in a baseline investigation of amino acids and related compounds in human cerebrospinal fluid (CSF). The procedure...
Determination of inorganic cations and ammonium in environmental waters by ion chromatography with a high-capacity cation-exchange column
Thomas DH, et al.
Journal of Chromatography A, 956(1-2), 181-186 (2002)
Pawel Pohl et al.
Talanta, 71(2), 715-721 (2007-02-15)
An operationally defined fractionation protocol was developed to study the partitioning of Ca, Mg, Fe and Zn in UHT cow milks. The method was based on sorption of distinct metal species by two ion exchange columns, namely strong cation exchanger...
M B Medina et al.
Journal of chromatography, 614(2), 315-323 (1993-05-05)
Clean-up procedures for the isolation of zeranol and diethylstilbestrol (DES) were modified to reduce the analysis time and to increase the efficiency of purification. Several dyes (Fast Blue BB, Fast Corinth V, Fast Blue RR, Fast Blue B, Fast Red...
Separation of aliphatic carboxylic acids and benzenecarboxylic acids by ion-exclusion chromatography with various cation-exchange resin columns and sulfuric acid as eluent.
Ohta K, et al.
Journal of Chromatography A, 997(1-2), 117-125 (2003)
Shubo Dong et al.
Analytical sciences : the international journal of the Japan Society for Analytical Chemistry, 33(3), 293-298 (2017-03-18)
A sensitive non-derivatization method for the determination of the highly polar compound 3-aminopiperidine was developed using a mixed-mode column combined with a charged aerosol detector (CAD). Chromatographic conditions, including the type of detector, separation mode, and mobile phase composition, were...
David V McCalley
Journal of chromatography. A, 1483, 71-79 (2017-01-11)
Trifluoracetic acid (TFA) added to the aqueous acetonitrile mobile phase induces some unexpected changes in the ionic component of retention in hydrophilic interaction separations when using Type B silica and amide-bonded silica columns. TFA use results in anion exchange properties...
Xin Zhang et al.
Journal of chromatography. A, 1621, 461052-461052 (2020-04-10)
Ion chromatography-electrospray tandem mass spectrometry (IC-ESI-MS/MS) is used to determine nine haloacetic acids (HAAs), bromate, and dalapon in drinking water samples in U.S. EPA Method 557. In this method, all target analytes are separated and measured with good sensitivity without...
K C Kuo et al.
Clinical chemistry, 24(8), 1373-1380 (1978-08-01)
A rapid, automated chromatographic method has been developed for the quantitation of the nucleic acid catabolites beta-aminoisobutyric acid and beta-alanine in urine, serum, and other physiological fluids. The analyses were performed on a modified Beckman 121M amino acid analyzer with...
Aaron P Mosier et al.
Journal of environmental management, 160, 67-72 (2015-06-22)
The modern semiconductor industry relies heavily on a process known as chemical mechanical planarization, which uses physical and chemical processes to remove excess material from the surface of silicon wafers during microchip fabrication. This process results in large volumes of...
P R Foster et al.
Vox sanguinis, 86(2), 92-99 (2004-03-17)
The risk of haemophiliacs contracting variant Creutzfeldt-Jakob disease (vCJD) via treatment with factor VIII concentrates is not known. Therefore, in order to determine the extent to which the vCJD agent might be removed during the preparation of factor VIII concentrate...
Amarande Murisier et al.
Journal of pharmaceutical and biomedical analysis, 172, 320-328 (2019-05-16)
In this second part of the series, recently commercialized cation exchanger stationary phases were systematically investigated for their capabilities to separate therapeutic monoclonal antibodies. It was demonstrated that the different combinations of stationary and mobile phases result in diverse retention...
Christine Machold et al.
Journal of biotechnology, 117(1), 83-97 (2005-04-16)
Two different approaches of matrix assisted refolding have been evaluated and compared to conventional refolding by dilution. Bovine alpha-lactalbumin was used for the studies as model protein. It was adsorbed under denaturing conditions on an ion exchange matrix and refolding...
P Roy et al.
Comparative biochemistry and physiology. Part B, Biochemistry & molecular biology, 115(1), 87-95 (1996-09-01)
A serine collagenolytic protease was purified from a water soluble fraction of greenshore crab digestive gland by acidic precipitation, gel filtration on a Sephadex G-50 column, ion-exchange chromatography on a Fractogel TSK DEAE column, immobilized metal ion affinity chromatography (IMAC)...
P Gluszcz et al.
Bioprocess and biosystems engineering, 26(3), 185-190 (2004-03-05)
The aim of the study was to determine properties of selected ion-exchange resins for citric and lactic acids recovery, to define sorption isotherms for these acids at different temperatures (in the range of 20-60 degrees C) and to determine diffusion...
Lian Shan et al.
Journal of the American Society for Mass Spectrometry, 19(8), 1132-1137 (2008-06-10)
A new analytical technique, gradient chromatofocusing-mass spectrometry (gCF-MS), was developed employing ion-exchange high-performance liquid chromatography (HPLC) interfaced to an electrospray-quadrupole mass spectrometer in the determination of proteins. There have been few reports, if any, of a HPLC-MS technique for proteins...
P R Levison et al.
Journal of chromatography. A, 890(1), 45-51 (2000-09-08)
A new technique in downstream processing, suspended bed chromatography has been developed. This hybrid technique exploiting the benefits of batch adsorption and the process advantages of an enclosed column system can be carried out using established contactors and adsorbents. A...
Ming-Huei Lin et al.
Reproduction (Cambridge, England), 136(5), 559-571 (2008-08-22)
We report a secreted serine protease inhibitor Kazal-type-like (SPINKL) protein. The SPINKL protein was purified from mouse seminal vesicle secretions through a series of steps, including ion-exchange chromatography on a diethylaminoethyl-Sephacel column, gel filtration on a Sephadex G-75 column, and...

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