Optimization of detection sensitivity in the analysis of inorganic cations by capillary ion electrophoresis using indirect photometric detection

Weston, Andrea; Brown, Phyllis R.; Jandík, Petr; Heckenberg, A.L.; Jones, William

doi:10.1016/0021-9673(92)87147-z

Cited by 75 publications

(21 citation statements)

References 18 publications

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“…As summarized in Table I, the K ass increased in the order of Li + ≈ Na + < NH 4 + ≈ K + << Sr 2+ < Ca 2+ < Mg 2+ in PFOSA, NH 4 + ≈ K + < Na + < Li + < Sr 2+ < Ca 2+ < Mg 2+ in Brij35 and C12N3S, and Li + < NH 4 + ≈ K + < Na + << Sr 2+ < Ca 2+ < Mg 2+ in DPC. It should be noted that the K ass values of divalent cations observed for PFOSA were larger those for Brij35, C12N3S, and DPC.…”

Section: Determination Of Association Constant Of Inorganic Cations Tmentioning

confidence: 93%

“…In cation separations by CE, Hjertén first reported for the separation of Bi 3+ and Cu 2+ with lactic acid as complexing agent [3]. From this work, many papers have been published on the analysis of alkali and alkaline earth metals, and ammonium ion [4][5][6] in the early 1990s.…”

Section: Introductionmentioning

confidence: 99%

“…For example, crown ethers have been applied to CE to improve the separation of K + and NH 4 + [5,6]. Many transition metals have been analyzed by CE [7][8][9] and micellar electrokinetic chromatography (MEKC) [10], using complexing agents, such as α-hydroxyisobutyric acid, pyridylazoresorcin, and/or ethylenediaminetetraacetic acid, which are either added to the background electrolyte (BGE) or to the sample before introduction to the capillary.…”

Section: Introductionmentioning

confidence: 99%

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Effect of perfluorinated surfactant as additive of background electrolyte for capillary electrophoresis of inorganic cations

Mori¹,

Ikeda²,

Itabashi³

2012

Acta Chromatographica

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Summary. This study reports the effect of a nonionic perfluorinated surfactant, N-polyoxyethylene-N-propyl perfluorooctane sulfonamide (PFOSA), as additive of background electrolyte on capillary electrophoresis (CE) of common inorganic cations. The association constants (K ass ) for PFOSA estimated from the electrophoretic mobility of analyte cations were the order of Mg 2+ > Ca 2+ > Sr 2+ >> K + ≈ NH 4 + > Na + ≈ Li + . The K ass values were larger than those for zwitterionic and nonionic surfactants with hydrocarbon moiety. Use of PFOSA made another essential contribution to the determination of inorganic cations in a protein-containing sample. This was considered because high solubility of PFOSA for proteins functioned as suppressor for protein adsorption to the capillary wall. Four inorganic cations, Na + , K + , Mg 2+ , and Ca 2+ , in human saliva sample were successfully determined by sample injection without any pretreatments except for filtration and dilution.

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Section: Determination Of Association Constant Of Inorganic Cations Tmentioning

confidence: 93%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Effect of perfluorinated surfactant as additive of background electrolyte for capillary electrophoresis of inorganic cations

Mori¹,

Ikeda²,

Itabashi³

2012

Acta Chromatographica

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show abstract

“…Because of its speed, resolving power, minimal sample and reagent requirements, greater simplicity in operation compared to IC and adaptability to a variety of applications using different separation conditions, it has been applied extensively to many analytes in a variety of areas. Many papers were published on the analysis of alkali, alkaline earth and NH 4 + [2][3][4][5] in the early 1990s. Crown ethers have been applied to CE to improve the separation of K + and NH 4 + [3,5].…”

Section: Introductionmentioning

confidence: 99%

Simultaneous separation of nine metal ions and ammonium with nonaqueous capillary electrophoresis

Lin

Chen

2004

Journal of Chromatography A

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Abstract+ in methanol is reported. The optimization for separation these 10 cations was achieved by using 0.5% acetic acid and 10 mM imidazole as electrolyte. The effects of water and ionic strength in the sample are discussed. The sensitive detection of transition metal ions was accomplished at 191 nm. The optimized method demonstrated high efficiency and good reproducibility, and was applied successfully to the qualitative and quantitative determination of transition metal ions in water samples, chemical reagents, oral zinc gluconate solution and human plasma.

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“…Therefore, an indirect UV absorption technique, in which the analyte displaces a mobile phase additive in the eluted band, has been used successfully in capillary electrophoresis. [7][8][9][10][11][12][13] The displacement causes a decrease in the absorption or fluorescence signal, because the concentration of the mobile-phase additive is lower in the eluted bands when compared with its steady-state concentration.…”

mentioning

confidence: 99%

Determination of Na and Al Ions in Semiconductor Cleaning Solution Using Capillary Electrophoresis

Lee¹,

Lim

2003

Bulletin of the Korean Chemical Society

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Optimization of detection sensitivity in the analysis of inorganic cations by capillary ion electrophoresis using indirect photometric detection

Cited by 75 publications

References 18 publications

Effect of perfluorinated surfactant as additive of background electrolyte for capillary electrophoresis of inorganic cations

Effect of perfluorinated surfactant as additive of background electrolyte for capillary electrophoresis of inorganic cations

Simultaneous separation of nine metal ions and ammonium with nonaqueous capillary electrophoresis

Determination of Na and Al Ions in Semiconductor Cleaning Solution Using Capillary Electrophoresis

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