1993
DOI: 10.1016/0021-9673(93)80216-u
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Parameters influencing separation and detection of anions by capillary electrophoresis

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Cited by 161 publications
(63 citation statements)
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“…The organic solvent destroys the hydrated layer and thus changes the effective mass of the ions. Ions such as iodide and chloride which are difficult to separate in an electrolyte consisting of pyromellitic acid and hexamethonium hydroxide, can be separated after addition of methanol [24]. An organic solvent also decreases the EOF by increasing the solution viscosity and changing the pK a of the silanol groups present on the capillary inner wall.…”
Section: Selectivity Optimizationmentioning
confidence: 99%
“…The organic solvent destroys the hydrated layer and thus changes the effective mass of the ions. Ions such as iodide and chloride which are difficult to separate in an electrolyte consisting of pyromellitic acid and hexamethonium hydroxide, can be separated after addition of methanol [24]. An organic solvent also decreases the EOF by increasing the solution viscosity and changing the pK a of the silanol groups present on the capillary inner wall.…”
Section: Selectivity Optimizationmentioning
confidence: 99%
“…Indeed, at such concentrations of xylitol, the medium can be considered as partially organic and a change in the hydration of ions [24], in the dielectric constant [24,25] or in the temperature can affect the ion mobility in a way that is difficult to quantify. Besides, the effects of ionic strength variations on mobility cannot be taken into account by the classical laws [30], as they are only valid in pure aqueous solutions.…”
Section: Determination Of the Association Constant And Discussionmentioning
confidence: 99%
“…This behavior, due to the formation of hydroxide complexes of samarium, was not observed at the other pHs. Because the addition of a neutral ligand changes the dielectric constant of a solution and can thus modify the ionic state of an analyte [24,25], a change in the speciation of samarium was also investigated when xylitol concentration is varied. Ligand concentration was then varied at 0.50, 1.00, and 2.00 M at pH = 6.0 and 4.5.…”
Section: Influence Of Ph and Dielectric Constant Variationmentioning
confidence: 99%
“…A FSCE é empregada na análise de solutos iônicos que diferem em suas razões carga/ raio. Esta é a modalidade de eletroforese mais utilizada porque é bastante adequada para a separação de solutos iônicos, os quais incluem ânions e cátions inorgânicos [17][18][19] , ácidos 20,21 e aminas orgâni-cos e ainda macromoléculas como proteínas 22 . Além de ser uma téc-nica versátil, CE requer uma instrumentação relativamente simples.…”
Section: Eletroforese Capilar Em Solução Livreunclassified