Polyethers in inorganic capillary electrophoresis

Okada, Tetsuo

doi:10.1016/s0021-9673(98)00738-9

Cited by 31 publications

(20 citation statements)

References 52 publications

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“…Several key papers addressed the issues of selectivity, detection and applications [7][8][9][10][11][12][13]. Methods using various strongly absorbing electrolyte co-ions such as pyridine [14], imidazole [15,16], cerium (III) ions [17] copper(II) ions [18], UV-CAT 1 [19], or benzimidazole [20], have been described.…”

Section: Introductionmentioning

confidence: 99%

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Capillary electrophoretic study of interactions of metal ions with crown ethers, a sulfated β-cyclodextrin, and zwitterionic buffers present as additives in the background electrolyte

2002

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Stability constants of K, Na, Ca, and Ba with 18-crown-6, K, Na, Li with sulfated beta-cyclodextrin and K, Li, Ca, Mg, Sr, and Ba ions with ([2-hydroxy-1,1-bis(hydroxymethyl) ethyl]-amino)-1-propanesulfonic acid (TAPS) were determined by capillary electrophoresis and computed using a general least squares minimizing program CELET. The results for 18-crown-6 agreed well with those evaluated by graphical methods or reported in the literature. Previously unknown stability constants of sulfated beta-cyclodextrins and TAPS determined for alkali and alkaline earth metals show that sulfated beta-cyclodextrin interacts with monovalent metals allowing to manipulate their effective mobility. It interacts stronger with divalent metal cations. TAPS, as zwitterionic buffer widely used in various analytical, biochemical and other applications, forms complexes with alkali and alkaline earth cations, and although the stability constants are rather low, the equilibria should be taken into account when TAPS is used and metal cations are present in solution at the same time.

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Section: Introductionmentioning

confidence: 99%

“…Crown ethers are macrocyclic polyethers, usually with oxygen donor atoms [11]. Since their discovery by Pederson in 1967, the crown ethers have proved to be very popular and extremely useful ligands for complexation of a number of metal ions.…”

Section: Introductionmentioning

confidence: 99%

Capillary electrophoretic study of interactions of metal ions with crown ethers, a sulfated β-cyclodextrin, and zwitterionic buffers present as additives in the background electrolyte

2002

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“…cyclodextrins or crown ethers are added to the BGE [14,28,29]. Addition of neutral receptor to the BGE decreases the effective mobilities of central ions due to their complexation with the large neutral receptor molecules.…”

Section: Selection Of Separation Conditionsmentioning

confidence: 99%

Affinity capillary electrophoresis and density functional theory applied to binding constant determination and structure elucidation of hexaarylbenzene-based receptor complex with ammonium cation

Ehala

Toman

Makrlík

et al. 2011

Journal of Chromatography A

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“…[16 -18]. Moreover, micro heterogeneous aggregates are formed at higher concentrations of polyether and chromatographic partition between bulk electrolyte phase and polyether rich clusters is expected [19,20]. Thus, we tested the effect of PEG 2000 on the migration of 3-QNu derivatives.…”

Section: Detection Sensitivity and Separationmentioning

confidence: 99%

Analysis of 3‐quinuclidinol derivatives by capillary electrophoresis

Bednář¹,

Barták

Lemr

et al. 2003

J of Separation Science

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Analysis of 3-quinuclidinol derivatives by capillary electrophoresisCapillary electrophoresis with indirect UV detection was applied to the analysis of a mixture of 3-quinuclidinol and its four quaternary derivatives (N-methyl, N-ethyl, Npropyl, and N-isopropyl derivative). 10 mM imidazole acetate buffer, pH = 4.0 offers suitable detection sensitivity (LOD = 1 lmol L -1 ) and permits separation of the mixture except for the pair 3-quinuclidinol -N-methyl derivative. The separation of all analytes was achieved on addition of 15 mmol L -1 b-cyclodextrin or 25% (w/w) polyethylene glycol 2000 to the background electrolyte. The optimized method was employed for the analysis of pond water spiked with these analytes. Actual ionic mobilities of the studied compounds were measured using mobility standards (potassium, sodium, tetramethyl-and tetrabutylammonium). The migration index was derived as another identification parameter based on migration data and the precision of the obtained values is discussed in brief.

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Polyethers in inorganic capillary electrophoresis

Cited by 31 publications

References 52 publications

Capillary electrophoretic study of interactions of metal ions with crown ethers, a sulfated β-cyclodextrin, and zwitterionic buffers present as additives in the background electrolyte

Capillary electrophoretic study of interactions of metal ions with crown ethers, a sulfated β-cyclodextrin, and zwitterionic buffers present as additives in the background electrolyte

Affinity capillary electrophoresis and density functional theory applied to binding constant determination and structure elucidation of hexaarylbenzene-based receptor complex with ammonium cation

Analysis of 3‐quinuclidinol derivatives by capillary electrophoresis

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