Capillary Electrophoresis of Small Anions in Complex Samples with a Hollow Fiber Sampling Inlet End

Wu, Xing-Zheng; Kasashima, Kasanori; Sakai, Miyo

doi:10.2116/analsci.19.1541

Cited by 4 publications

(2 citation statements)

References 14 publications

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“…A modified design of the ED device was later presented for determination of small inorganic anions in real complex samples, e.g. in milk samples [72]. The HF was in this case used as a simple ED membrane and only low molecular ions were injected into the fiber lumen during a 5 s injection period, while high molecular mass substances (such as proteins) were not allowed to pass through the fiber walls into the lumen.…”

Section: Edmentioning

confidence: 99%

Electric field‐enhanced transport across phase boundaries and membranes and its potential use in sample pretreatment for bioanalysis

2010

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Separation techniques, such as electrodialysis, electroextraction, electro-membrane extraction and extraction across phase interfaces, are reviewed and discussed as methods for sample cleanup and preconcentration. This survey clearly shows that electromigration of ionic species across phase interfaces, especially across supported liquid membranes, may be very selective and is strongly dependent on the chemical composition of these interfaces. Thus, electric field-enhanced transport across chemically tailored liquid membranes may open new perspectives in preparative analytical chemistry. This review offers comprehensive survey of related literature and discussion of the topic, which may stimulate interest of experts and practitioners in bioanalysis.

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Section: Edmentioning

confidence: 99%

Electric field‐enhanced transport across phase boundaries and membranes and its potential use in sample pretreatment for bioanalysis

2010

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“…The preconcentrated proteins in the fibre lumen were then electrophoretically transferred into the separation capillary and determined by CE. ED was also used for the determination of small inorganic anions in complex samples – small anions could migrate inside the lumen, while high‐molecular‐weight compounds were selectively retained on the fibre walls and did not enter the lumen during the ED step 28. Recently, two other publications using combination of ED sample pretreatment with CE analysis were presented for protein preconcentration by Wang et al 29 and by Liu and Pawliszyn 30.…”

Section: Introductionmentioning

confidence: 99%

Analysis of inorganic cations in biological samples by the combination of micro‐electrodialysis and capillary electrophoresis with capacitively coupled contactless conductivity detection

Doan

Kubáň

et al. 2011

Electrophoresis

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Micro-electrodialysis (μED) and CE were combined for rapid pretreatment and subsequent determination of inorganic cations in biological samples. Combination of μED with CE greatly improved the analytical performance of the latter as the adsorption of high molecular weight compounds present in real samples on the inner capillary wall was eliminated. Fifty microliter of 80-fold diluted human body fluids such as plasma, serum and whole blood was used in the donor compartment of the μED system requiring less than 1 μL of the original body fluid per analysis. Inorganic cations that migrated through a cellulose acetate dialysis membrane with molecular weight cut-off value of 500 Da were collected in the acceptor solution and were then analyzed using CE-C⁴D. Baseline separation of inorganic cations was achieved in a BGE solution consisting of 12.5 mM maleic acid, 15 mM L-arginine and 3 mM 18-crown-6 at pH 5.5. Repeatability of the CE-C⁴D method was better than 0.5% and 2.5% for migration times and peak areas, respectively; limits of detection of all inorganic cations in the presence of 2 mM excess of Na(+) were around 1 μM and calibration curves were linear with correlation coefficients better than 0.998. Repeatability of the sample pretreatment procedure was calculated for six independent electrodialysis runs of artificial and real samples and was better than 11.8%. Recovery values between 96.3 and 110% were achieved for optimized electrodialysis conditions of standard solutions and real samples; lifetime of the dialysis membranes for pretreatment of real samples was estimated to 100 runs.

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Direct coupling of supported liquid membranes to capillary electrophoresis for analysis of complex samples: A tutorial

Kubáň

Boček

2013

Analytica Chimica Acta

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Capillary Electrophoresis of Small Anions in Complex Samples with a Hollow Fiber Sampling Inlet End

Cited by 4 publications

References 14 publications

Electric field‐enhanced transport across phase boundaries and membranes and its potential use in sample pretreatment for bioanalysis

Electric field‐enhanced transport across phase boundaries and membranes and its potential use in sample pretreatment for bioanalysis

Analysis of inorganic cations in biological samples by the combination of micro‐electrodialysis and capillary electrophoresis with capacitively coupled contactless conductivity detection

Direct coupling of supported liquid membranes to capillary electrophoresis for analysis of complex samples: A tutorial

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