Showing 1-11 of 11 results for "319775"
Erin P Shields et al.
Journal of chromatography. A, 1618, 460851-460851 (2020-02-06)
Mixed-mode cation-exchange stationary phases are useful for the separation of mixtures containing hydrophobic, acidic, and basic molecules. To ensure that weak organic bases are protonated and carboxylic acids are neutral low pH mobile phases are required. Mixed-mode stationary phases that...
Erin P Shields et al.
Journal of chromatography. A, 1598, 132-140 (2019-04-15)
Stationary phases that can withstand extremes of pH and temperature are needed to allow a single column to accommodate a wider set of solutes and separation criteria. We used a simple multi-step process using the thiol-yne reaction following the modification...
Sam Wouters et al.
Journal of chromatography. A, 1523, 224-233 (2017-06-18)
The present paper discusses practical aspects of prototyping of microfluidic chips using cyclic olefin copolymer as substrate and the application in high-performance liquid chromatography. The developed chips feature a 60mm long straight separation channel with circular cross section (500μm i.d.)...
Diana Sanchez Garcia et al.
Chemico-biological interactions, 281, 1-10 (2017-12-19)
Many chemicals accumulate in organisms through a variety of different mechanisms. Cationic amphiphilic drugs (CADs) accumulate in lysosomes and bind to membranes causing phospholipidosis, whereas many lipophilic chemicals target adipose tissue. Perfluoroalkyl substances (PFASs) are widely used as surfactants, but...
Yan Ma et al.
Journal of chromatography. A, 1383, 47-57 (2015-02-05)
Prototype small-size (1.0mm I.D., 5cm long) columns for reversed-phase HPLC were evaluated in relation to instrument requirements. The performance of three types of columns, monolithic silica and particulate silica (2μm, totally porous and 2.6μm, core-shell particles) was studied in the...
Fabrice Gritti et al.
Journal of chromatography. A, 1355, 179-192 (2014-07-09)
The mass transfer mechanism in four prototype columns (2.1 and 3.0×50mm, 2.1 and 3.0×100mm) packed with 1.9μm fully porous Titan-C18 particles was investigated by using two previously reported home-made protocols. The first one was used to measure the eddy dispersion...
Shunta Futagami et al.
Journal of chromatography. A, 1595, 58-65 (2019-02-26)
We report on the ability to change the layer properties of porous layered radially elongated pillar (PLREP) array columns and its relevance to the separation efficiency. The adjustment of the preparation condition resulted in the formation of a 1.2-fold thicker...
Fabrice Gritti et al.
Journal of chromatography. A, 1355, 164-178 (2014-06-28)
In a previous report, it was reported that columns packed with fully porous 1.9μm Titan-C18 particles provided a minimum reduced plate height as small as 1.7 for the most retained compound (n-octanophenone) under RPLC conditions. These particles are characterized by...
Fabrice Gritti et al.
Journal of chromatography. A, 1384, 76-87 (2015-02-11)
Previous data have shown that could deliver a minimum reduced plate height as small as 1.7. Additionally, the reduction of the mesopore size after C18 derivatization and the subsequent restriction for sample diffusivity across the Titan-C18 particles were found responsible...
Martyna Baca et al.
Analytical chemistry, 91(17), 10932-10936 (2019-08-15)
In the present study, the peak capacity potential of ultralong porous cylindrical pillar array columns is investigated. Coupling 4 columns of 2 m long allows for working near the minimal separation impedance of small molecules under retained conditions at a...
Shunta Futagami et al.
The Analyst, 144(5), 1809-1817 (2019-01-24)
The performance of a porous-layered radially elongated pillar (PLREP) array column in a commercial nano-LC system was examined by performing separation of alkylphenones and peptides. The mesoporous silica layer was prepared by sol-gel processing of a mixture of tetramethoxysilane and...

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