研究者詳細 - 金田　隆

EFFECT OF ADDITION OF GLUCOSE ON MICELLAR ELECTROKINETIC CAPILLARY CHROMATOGRAPHY WITH SODIUM DODECYL-SULFATE 査読

T KANETA, S TANAKA, M TAGA, H YOSHIDA

JOURNAL OF CHROMATOGRAPHY 609 ( 1-2 ) 369 - 374 1992年9月

担当区分：筆頭著者記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：ELSEVIER SCIENCE BV

Glucose was investigated as a possible additive for the improvement of resolution in micellar electrokinetic capillary chromatography. Addition of glucose to the micellar solution facilitated the complete separation of a mixture of nine nucleosides by both extending the elution range and changing the selectivity. Extension of the elution range can be attributed to an increase in the electrophoretic mobility of the micelle. It is also apparent that glucose selectively reduces the distribution coefficients for solutes containing a hydrophilic functional group. This effect was valuable in the separation of some solutes with hydrophilic functional groups and large capacity factors.

MIGRATION BEHAVIOR OF INORGANIC ANIONS IN MICELLAR ELECTROKINETIC CAPILLARY CHROMATOGRAPHY USING A CATIONIC SURFACTANT 査読

T KANETA, S TANAKA, M TAGA, H YOSHIDA

ANALYTICAL CHEMISTRY 64 ( 7 ) 798 - 801 1992年4月

担当区分：筆頭著者記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：AMER CHEMICAL SOC

The interactions between inorganic anions and a cationic surfactant were investigated using micellar electrokinetic capillary chromatography (MECC). Using cetyltrimethylammonium chloride (CTAC) as a cationic surfactant, the effective electrophoretic mobilities of inorganic anions decreased due to two processes. The first was the ion association equilibria with a monomeric surfactant below the critical micellar concentration (cmc) and the other was partitioning into the micelle above the cmc. Fundamental equations for migration of ionic species in MECC were derived using the effective electrophoretic mobility as an electrochemical parameter. Ion association constants of inorganic anions with cationic surfactant and distribution coefficients into the micelle were estimated on the basis of these equations.

DOI： 10.1021/ac00031a017

CAPILLARY-TUBE ISOTACHOPHORETIC SEPARATION OF CATECHOLAMINES USING CYCLODEXTRIN IN THE LEADING ELECTROLYTE 査読

S TANAKA, T KANETA, M TAGA, H YOSHIDA, H OHTAKA

JOURNAL OF CHROMATOGRAPHY 587 ( 2 ) 364 - 367 1991年12月

記述言語：英語出版者・発行元：ELSEVIER SCIENCE BV

The isotachophoretic separation of catecholamines based on inclusion complex formation with beta-cyclodextrin (beta-CD) was investigated. Separability was improved with increasing concentration of beta-CD in the leading electrolyte. It was found that a neutral surfactant, added to suppress the electroosmotic flow and to form sharp zone boundaries, affects the resolution. Six catecholamines were separated by using complex formation with beta-CD.

DOI： 10.1016/0021-9673(91)85186-J

HIGH-PERFORMANCE SEPARATION BY CAPILLARY-TUBE ISOTACHOPHORESIS UTILIZING COMPLEX-FORMING EQUILIBRIA 招待査読

H YOSHIDA, S TANAKA, T KANETA, Y HIRAMA

ANALYTICAL SCIENCES 7 ( 5 ) 673 - 682 1991年10月

記述言語：英語出版者・発行元：JAPAN SOC ANALYTICAL CHEM

Developments in the migrating systems to improve the resolution and sensitivity of capillary tube isotachophoresis (ITP) are described. They are related to the use of complex-forming equilibria in the migrating column and nonaqueous solvents as the migrating medium. The considered sources of ligand for the complex-forming equilibria are (a) the counter ion in the leading electrolyte, (b) the neutral ligands added into the leading electrolyte and (c) the terminating ions. Actual separations performed by these systems are shown and their features and advantages are discussed. Migrating systems consisting of nonaqueous solvents such as dimethylformamide and acetonitrile enable the migration of analyte species which can not be realized in an aqueous medium to improve the selectively and sensitivity. Combining ITP with solvent extraction provides useful analytical techniques.

DOI： 10.2116/analsci.7.673

CAPILLARY-TUBE ISOTACHOPHORETIC SEPARATION OF LANTHANIDE COMPLEXES USING POLYAMINOCARBOXYLIC ACID AS TERMINATING ION 査読

S TANAKA, T KANETA, K NISHIMURA, H YOSHIDA

JOURNAL OF CHROMATOGRAPHY 540 ( 1-2 ) 475 - 478 1991年3月

記述言語：英語出版者・発行元：ELSEVIER SCIENCE BV

EDTA and TTHA solutions were used as terminating electrolytes and 10 mM HCl containing 45% (v/v) acetone as the leading electrolyte. Gd, Eu, Sm, Pr, Ce and La ions were separated as their anionic chelates when EDTA was used as the terminating ion. The migration order of the chelates was in accord with the order of their stability constants.

DOI： 10.1016/S0021-9673(01)88841-5

IMPROVEMENT OF RESOLUTION IN THE CAPILLARY ELECTROPHORETIC SEPARATION OF CATECHOLAMINES BY COMPLEX-FORMATION WITH BORIC-ACID AND CONTROL OF ELECTROOSMOSIS WITH A CATIONIC SURFACTANT 査読

T KANETA, S TANAKA, H YOSHIDA

JOURNAL OF CHROMATOGRAPHY 538 ( 2 ) 385 - 391 1991年2月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：ELSEVIER SCIENCE BV

In order to improve the resolution of catecholamines, the control of both the electroosmotic and the electrophoretic mobilities were carried out. The former was controlled by the addition of borate ion and a change in pH. The control of the latter was carried out by addition of a cationic surfactant. Ten catecholamines were sufficiently separated.

DOI： 10.1016/S0021-9673(01)88859-2