Tetsuo Okada

T. Okada, Analyst, 1993, 118, 959 DOI: 10.1039/AN9931800959

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTNonsuppressor ion chromatography of inorganic and organic anions with potassium hydroxide as eluentTetsuo. Okada and Tooru. KuwamotoCite this: Anal. Chem. 1983, 55, 7, 1001–1004Publication Date (Print):June 1, 1983Publication History Published online1 May 2002Published inissue 1 June 1983https://pubs.acs.org/doi/10.1021/ac00258a005https://doi.org/10.1021/ac00258a005research-articleACS PublicationsRequest reuse permissionsArticle Views277Altmetric-Citat

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTTime-resolved light scattering studies on the early stage of crystallization in isotactic polypropyleneTetsuo Okada, Hiromu Saito, and Takashi InoueCite this: Macromolecules 1992, 25, 7, 1908–1911Publication Date (Print):March 1, 1992Publication History Published online1 May 2002Published inissue 1 March 1992https://pubs.acs.org/doi/10.1021/ma00033a011https://doi.org/10.1021/ma00033a011research-articleACS PublicationsRequest reuse permissionsArticle Vi

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTEfficient evaluation of poly(oxyethylene) complex formation with alkali-metal cationsTetsuo OkadaCite this: Macromolecules 1990, 23, 19, 4216–4219Publication Date (Print):September 1, 1990Publication History Published online1 May 2002Published inissue 1 September 1990https://pubs.acs.org/doi/10.1021/ma00221a006https://doi.org/10.1021/ma00221a006research-articleACS PublicationsRequest reuse permissionsArticle Views289Altmetric-Citations46LEARN ABOUT THE

The local structures of Cl- and Br- in an anion-exchange resin have been investigated by X-ray absorption fine structure (XAFS). The resins, which have been equilibrated under various partial water vapor pressures to allow the anions to have various hydration numbers, are provided for XAFS measurements. The XAFS spectra indicate that two scattering groups around the counteranion are present, that is, water molecules and an ion-exchange group. Regression analyses allow the separation of the contr

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTTemperature-induced phase separation of nonionic polyoxyethylated surfactant and application to extraction of metal thiocyanatesTetsuo. OkadaCite this: Anal. Chem. 1992, 64, 18, 2138–2142Publication Date (Print):September 15, 1992Publication History Published online1 May 2002Published inissue 15 September 1992https://pubs.acs.org/doi/10.1021/ac00042a019https://doi.org/10.1021/ac00042a019research-articleACS PublicationsRequest reuse permissionsArticle V

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTFormation mechanism of dip peaks in nonsuppressed ion chromatographyTetsuo. Okada and Tooru. KuwamotoCite this: Anal. Chem. 1984, 56, 12, 2073–2078Publication Date (Print):October 1, 1984Publication History Published online1 May 2002Published inissue 1 October 1984https://pubs.acs.org/doi/10.1021/ac00276a022https://doi.org/10.1021/ac00276a022research-articleACS PublicationsRequest reuse permissionsArticle Views120Altmetric-Citations42LEARN ABOUT THESE

The partition of ions to zwitterionic surfaces is studied chromatographically and evaluated on the bases of two developed models, the partition and the ion-pair models, which are derived from the Poisson−Boltzmann theory. The zwitterionic surfaces are prepared by the adsorption of a zwitterionic surfactant (3-(N-dodecyl-N,N-dimethylammonio)propane-1-sulfonate) on octylsilanized silica gel. Some characteristic behaviors are observed: (1) the retention of a probe anion, I-, shows a maximum at a co

When a solute passes through an open capillary, in which a laminar flow is established, different peak profiles can be obtained according to its diffusion property under a working condition, i.e., the radius and length of the capillary and the flow rate of the carrier solution. If a solute diffuses over the entire cross section of the capillary before it is eluted, a Gaussian-shaped diffusion peak appears, which has an apex at the travel time of the average flow. Insufficient solute diffusion, w

An ion-exchange chromatographic model based on the Stern-Gouy-Chapman electrical double-layer theory is presented. We assume several equilibria occurring at the surface of an ion-exchange resin, such as the ion-pair formation of counterions with an ion-exchange site, the adsorption of ions, and the ion-pair formation of an adsorbed ions with their counterions. These equilibria are affected by the potential at the planes (the surface and the Stern layer potential) where the reactions occur. In ad

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPotassium hydroxide eluent for nonsuppressed anion chromatography of cyanide, sulfide, arsenite, and other weak acidsTetsuo. Okada and Tooru. KuwamotoCite this: Anal. Chem. 1985, 57, 4, 829–833Publication Date (Print):April 1, 1985Publication History Published online1 May 2002Published inissue 1 April 1985https://pubs.acs.org/doi/10.1021/ac00281a013https://doi.org/10.1021/ac00281a013research-articleACS PublicationsRequest reuse permissionsArticle Views

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTChromatographic oligomer separation of poly(oxyethylenes) on potassium ion-form cation-exchange resinTetsuo. OkadaCite this: Anal. Chem. 1990, 62, 4, 327–331Publication Date (Print):February 15, 1990Publication History Published online1 May 2002Published inissue 15 February 1990https://pubs.acs.org/doi/10.1021/ac00203a004https://doi.org/10.1021/ac00203a004research-articleACS PublicationsRequest reuse permissionsArticle Views123Altmetric-Citations25LEAR