Use of cationic polymers for the simultaneous determination of inorganic anions and metal-4-(2-pyridylazo)resorcinolato chelates in kinetic differentiation-mode capillary electrophoresis

Krokhin, Oleg V.; Hoshino, Hitoshi; Шпигун, О. А.; Yotsuyanagi, Takao

doi:10.1016/s0021-9673(97)00420-2

Cited by 55 publications

(31 citation statements)

References 19 publications

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“…Corr and Anacleto (1996) used CE coupled with mass spectrometry with ion spray introduction on a wide variety of cations and anions. Although it is common practice to use quaternary ammonium salts, such as cetyltrimethylammonium chloride, to reverse the electroosmotic flow, Krokhin et al (1997) used water-soluble polymers with quaternary ammonium moieties to promote the elution of perchlorate by CE.…”

Section: Ion Chromatography and Capillary Electrophoresismentioning

confidence: 99%

Perchlorate Chemistry: Implications for Analysis and Remediation

Urbansky

1998

Bioremediation Journal

472

387

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Abstract:Since the discovery of perchlorate in the ground and surface waters of several western states, there has been increasing interest in the health effects resulting from chronic exposure to low (parts per billion [ppb]) levels. With this concern has come a need to investigate technologies that might be used to remediate contaminated sites or to treat contaminated water to make it safe for drinking. Possible technologies include physical separation (precipitation, anion exchange, reverse osmosis, and electrodialysis), chemical and electrochemical reduction, and biological or biochemical reduction. A fairly unique combination of chemical and physical properties of perchlorate poses challenges to its analysis and reduction in the environment or in drinking water. The implications of these properties are discussed in terms of remediative or treatment strategies. Recent developments are also covered.

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Section: Ion Chromatography and Capillary Electrophoresismentioning

confidence: 99%

Perchlorate Chemistry: Implications for Analysis and Remediation

Urbansky

1998

Bioremediation Journal

472

387

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“…The ionic mobility of iodide is close to the ionic mobilities of other small ions such as chloride, bromide, or anions sulfate, and nitrate (Table 1), and the main task is usually to increase resolution of iodide from these anions. The most often used way is decreasing mobility of iodide by complexation with quaternary ammonium surfactants [14,20,23,[25][26][27]31] or quaternary ammonium salt (tetrabutylammonium, TBA) [17,29], host-guest interactions with cyclodextrins [19,24,28,30], calix [4]arene [32], 18-crown-6 [15,17], diazocrown ether [16], and ion-pairing with cationic polymers poly(diallyldimethylammonium chloride) (PDADMAC) [33], Polybrene [21], PVPyB [21], PVP [28], and PEI [18]. The effect of huge amounts of chloride present in the sample was eliminated also by adding NaCl into the BGE used for the separation [26,27] or by performing the separation directly in BGE composed of higher concentrations of KCl [15] or NaCl-HCl [50].…”

Section: Ce and Cecmentioning

confidence: 99%

“…The effect of huge amounts of chloride present in the sample was eliminated also by adding NaCl into the BGE used for the separation [26,27] or by performing the separation directly in BGE composed of higher concentrations of KCl [15] or NaCl-HCl [50]. As iodide has an absorption maximum at 235 nm and its molar absorption coefficient increases also below 220 nm, optical detection in the low UV region can simply be used but also indirect detection with chromate BGE [21,24,25,46,48], phthalate [24,47], pyromellitate [22], or Tiron [19] being the absorbing BGE co-ion was reported. Amperometric [47], conductivity [13,[28][29][30] or potentiometric detectors [42,44,49,53] were used as well.…”

Section: Ce and Cecmentioning

confidence: 99%

Fast and simple method for determination of iodide in human urine, serum, sea water, and cooking salt by capillary zone electrophoresis

Pantůčková

Křivánková

2004

Electrophoresis

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For the determination of iodide in urine, where 80-90% of consumed iodine is excreted, a fast, simple, and sensitive method of capillary zone electrophoresis was elaborated and tested also for additional complex matrices such as human serum, cooking salt, and seawater. Several approaches were examined for the separation of iodide from other macro- and microcomponents in the tested matrices, and the best results were obtained when host-guest interaction with alpha-cyclodextrin or ion-pairing with polyethylenimine was employed. In both cases comparable resolution and sensitivity were reached. Due to the relatively high price of cyclodextrin only the method with polyethylenimine was further optimized and a simple procedure enabling the determination of iodide in untreated human urine, serum, cooking salt, and seawater was elaborated. The samples were injected for 20 s at 0.5 psi (3.45 kPa) into a fused-silica capillary (0.18 mm ID, 50 cm effective length) coated with polyacrylamide (electroosmotic flow < 2 x 10(-9) m(2)V(-1)s(-1)) and filled with the optimized background electrolyte composed of 20 mM KH(2)PO(4) and 0.7% m/v polyethylenimine. For detection, UV absorption at 200 and 230 nm was measured. Concentration limits of detection reached at 230 nm were for human urine 0.14 microM, for human serum 0.17 microM, for seawater 0.17 microM, and for cooking salt 89 nM. Relative standard deviations of iodide peak area and height in all matrices ranged within 0.93 to 4.19%.

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“…For slow-migrating molecules, such as large organic molecules and biomolecules, it can be certainly applied, but good resolution for analytes migrating against the natural direction is never reached [1]. Several approaches have been suggested to overcome this problem, namely, complexation, by which cations are usually transformed into negatively charged compounds and separated together with anions [2][3][4], or bidirectional ITP, consisting of sample injection into the center of a miniaturized planar separation channel containing two integrated on-column conductivity detectors positioned at opposite ends of the channel [5].…”

Section: Introductionmentioning

confidence: 99%

Dual-opposite injection capillary electrophoresis for the determination of anionic and cationic homologous surfactants in a single run

Priego-Capote

Castro

2005

Electrophoresis

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An electrophoretic method for the simultaneous separation and determination of cationic and anionic surfactants based on double electrokinetic injection from the two ends of the capillary is proposed here. Nonaqueous capillary electrophoresis (NACE) with methanol as solvent was used to reduce the electroosmotic flow so that under these conditions the analytes migrate toward the corresponding electrode. The optimization step was the key to solve the problems associated with surfactants analysis (namely, adsorption on the capillary wall, micelle formation, and those issues related to the separation of homologous compounds). Good results were obtained with the proposed method both for the analysis of both spiked and natural samples, thus demonstrating the applicability of the proposed method for routine analysis. Finally, a comparison between the proposed method and two methods for independent analysis of cationic and anionic surfactants was made. The results showed that the precision (between 1.90 and 4.10% for repeatability and 7.43 and 8.98% for within-laboratory reproducibility, both expressed as relative standard deviation) and sensitivity (limits of detection and quantification between 0.52 and 1.88 microg/mL and between 1.73 and 6.20 microg/mL, respectively) are not affected by the CE mode. The resolution was similar to or better than that of the comparison methods and the analysis time was considerably shortened as both types of compounds were determined in a single run in only 9 min.

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Use of cationic polymers for the simultaneous determination of inorganic anions and metal-4-(2-pyridylazo)resorcinolato chelates in kinetic differentiation-mode capillary electrophoresis

Cited by 55 publications

References 19 publications

Perchlorate Chemistry: Implications for Analysis and Remediation

Perchlorate Chemistry: Implications for Analysis and Remediation

Fast and simple method for determination of iodide in human urine, serum, sea water, and cooking salt by capillary zone electrophoresis

Dual-opposite injection capillary electrophoresis for the determination of anionic and cationic homologous surfactants in a single run

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