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  • compounds
  • The separation and characterization of bioactive compounds from plant extract is the crucial step in the study of phytochemicals. (amrita.edu)
  • A preparative-scale chromatographic process for the enrichment and isolation of closely related compounds such as ω-3 fatty acids from fish oil supplements is described. (nus.edu.sg)
  • The mixed-mode separation of a selection of anionic and cationic pharmaceutically related compounds is studied using ion-exchange columns and eluents consisting of ionic salts (potassium hydroxide or methanesulfonic acid) and an organic modifier (methanol). (docphin.com)
  • Fig. 2 shows such an LSC separation obtained on an actual mixture of the above compounds. (blogspot.com)
  • Selective
  • From an analytical perspective it is very fruitful to think of the second column and its associated detector as comprising a very chemically selective detector for the separation on the first column. (amrita.edu)
  • Naturally, selective extraction and separation of platinum (as well as platinum-group metals and gold) from associate metals become a problem in subsequent hydrometallurgical processing of these complex solutions. (hindawi.com)
  • analytical techniques
  • In particular, novel high-resolution hybrid instruments linked to ultra-High-Performance LC and the hyphenations of LC-MS with other separation or analytical techniques greatly aid unequivocal identification and highly sensitive quantification of natural products at trace concentrations in complex matrices. (amrita.edu)
  • Columns
  • The chromatographic columns employed were jacketed glass columns ranging from 1 m to 2 m long and the internal diameter ranging from 0.97 cm to 1.97 cm. (openaire.eu)
  • similar
  • The experiment carried out at 90°C, showed very similar separation to the base case with higher recoveries. (ukzn.ac.za)
  • Among the PGMs separations, Pd(II)/Pt(IV) mutual separation has been extensively investigated due to its difficulty based on their chemically similar properties. (hindawi.com)
  • concentration
  • Good separation of the La(III), Ce(III), Pr(III), Nd(III), and Dy(III) ions was achieved using HNO3 as eluent using a linear concentration gradient from 0 to 0.15 M over 55 min. (diva-portal.org)
  • Decreasing the concentration resulted in better separation. (ukzn.ac.za)
  • From the results it was concluded that the separation was dependant on concentration. (ukzn.ac.za)
  • Separations performed under methanol gradient conditions (while holding the competing ion concentration constant) were also modelled. (docphin.com)
  • electrophoresis
  • Moreover, the ability of native acyclic a-1,4-linked dextrin (i.e. maltoheptaose) to form molecular complexes and its use for chiral separation by capillary zone electrophoresis has been demonstrated,[5a] for example, for racemic 1,12-dimethylbenzo[c]phenanthrene5,8-dicarboxylic acid. (docme.ru)
  • acids
  • Subsequently, the individual ω-3 fatty acids were fractionated on a Waters PrepPak unit consisting of six cartridges (μBondapak phenyl silica) using an isocratic ternary mobile phase of acetonitrile-water-tetrahydrofuran (45:35:20, v/v/v). The separation was accomplished within 60 min without any recycling of the solutes. (nus.edu.sg)
  • small
  • However, the direct use of as-synthesized MOFs in packed column format is rather limited for analytical separations because of the small size and non-spherical shape of MOF crystals. (springer.com)
  • resolution
  • The new CSP was successfully applied to the resolution of various N-(substituted benzoyl)-α-amino amides with reasonably good separation factors and resolutions (α = 1.75 ~ 2.97 and R S = 2.89 ~ 6.82 for 16 analytes). (alfa-chemistry.com)
  • application
  • As a result, this exercise demonstrates the basics of the iterative process for optimization of separations and application of spreadsheets to solve relatively complex and tedious repetitive problems. (ed.gov)
  • Science
  • Published in the topical collection Rising Stars in Separation Science , as part of Chromatographia's 50th Anniversary Commemorative Issue. (springer.com)