Effect of the ionic strength of a mobile phase on the chromatographic retention and thermodynamic characteristics of the adsorption of enantiomers of α-phenylcarboxylic acids on a chiral adsorbent with grafted antibiotic eremomycin

2017 ◽  
Vol 91 (1) ◽  
pp. 167-174 ◽  
Author(s):  
E. N. Reshetova
Keyword(s):  
Ionic Strength ◽  
Mobile Phase ◽  
Thermodynamic Characteristics ◽  
Chromatographic Retention ◽  
Phenylcarboxylic Acids

Ionic strength effect on liquid chromatographic retention of benzenesulfonates on nonpolar adsorbents

1981 ◽  
Vol 59 (14) ◽  
pp. 2179-2183 ◽  
Author(s):  
Terry D. Rotsch ◽  
W. R. Cahill Jr ◽  
Donald J. Pietrzyk ◽  
Frederick F. Cantwell
Keyword(s):  
Ionic Strength ◽  
Electrical Double Layer ◽  
Mobile Phase ◽  
Chromatographic Retention ◽  
Square Root ◽  
Ionic Strength Effect ◽  
Styrene Divinylbenzene ◽  
Chromatographic Resolution ◽  
Liquid Chromatographic ◽  
Strength Effect

Chromatographic retention of substituted benzenesulfonate ions is studied on two nonpolar styrene–divinylbenzene adsorbents as a function of mobile phase ionic strength. On both Amberlite XAD-2 and Hamilton PRP-1, a plot of reciprocal of the capacity factor for each benzenesulfonate versus reciprocal of the square root of ionic strength is linear as predicted by Stern–Gouy–Chapman electrical double layer theory. Chromatographic resolution is improved by using an electrolyte-containing mobile phase.

Water-in-oil microemulsion as mobile phase in thin-layer chromatographic retention studies of anions

1995 ◽  
Vol 72 (12) ◽  
pp. 1533-1536 ◽  
Author(s):  
Ali Mohammad ◽  
Sharad Tiwari ◽  
Jay Pal Singh Chahar ◽  
Sanjeev Kumar
Keyword(s):  
Thin Layer ◽  
Mobile Phase ◽  
Chromatographic Retention

scholarly journals Ion-pair chromatographic monitoring of photographic effluents

2007 ◽  
Vol 5 (2) ◽  
pp. 455-465
Author(s):  
Giedrė Kesiũnaitė ◽  
Birutė Pranaitytė ◽  
Audrius Padarauskas ◽  
Arvydas Dikčius ◽  
Romas Ragauskas
Keyword(s):  
Ionic Strength ◽  
Mobile Phase ◽  
Ion Pair ◽  
Chromatographic Technique ◽  
Two Samples ◽  
Neutral Compounds ◽  
Before And After ◽  
Rapid Monitoring ◽  
Chromatographic Monitoring

AbstractIon-pair chromatographic technique was developed for the rapid and simple determination of the main contaminants (bromide, iodide, sulphite, thiosulphate, thiocyanate, iron(III)-EDTA chelate, free EDTA, hydroquinone and phenidone) in spent photographic solutions. Free EDTA was converted into stable Ni(II)-EDTA chelate prior to analysis. The optimal mobile phase conditions were established by varying the concentrations of tetrabutylammonium (TBA) phosphate and acetonitrile, pH and ionic strength. Separation of five inorganic anions, two metal chelates and two neutral compounds was accomplished in about 30 min using a mobile phase containing 7.5 mmol/L TBA-phosphate, 10 mmol/L NaCl (pH 6.5) and 20% (v/v) acetonitrile. The detection limits (UV detection at 210 nm) ranged from 0.4 µmol/L for phenidone to 8 µmol/L for sulphite with a linearity of 2–2.5 orders of magnitude. The method was applied to the rapid monitoring of spent photographic solutions before and after decomposition. The recovery tests established for two samples were within the range 95–103%.

Simultaneous effect of pH, temperature and mobile phase composition in the chromatographic retention of ionizable compounds

2011 ◽  
Vol 1218 (30) ◽  
pp. 4995-5009 ◽  
Author(s):  
Panagiota Agrafiotou ◽  
Clara Ràfols ◽  
Cecilia Castells ◽  
Elisabeth Bosch ◽  
Martí Rosés
Keyword(s):  
Phase Composition ◽  
Mobile Phase ◽  
Chromatographic Retention ◽  
Mobile Phase Composition ◽  
Effect Of Ph ◽  
Simultaneous Effect ◽  
Ionizable Compounds
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