Výsledky vyhledávání - "Issei Kasahara"

Micro-organic Ion-associate Phase Extraction via in situ Fresh Phase Formation for the Preconcentration and Determination of Di(2-ethylhexyl)phthalate in River Water by HPLC

Autor: Issei Kasahara, Noriko Hata, Kaori Ando, Shigeru Taguchi, Mika Yamada, Erini Yuwatini

Publikováno v: Analytical Sciences. 20:149-152

A high-enrichment method was proposed for the HPLC determination of trace di(2-ethylhexyl)phthalate (DEHP) in environmental water. A micro-organic ion-associate phase (IAP) was formed in situ from an aqueous sample by adding 4-trifluoromethylaniliniu

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b265937b48afb6d71b542f035dcc0324
https://doi.org/10.2116/analsci.20.149

Zobrazit plný text záznamu

Micro-Organic Ion-Associate Phase Extraction via in situ Fresh Phase Formation for Preconcentration and Determination of Trace Analysis in Environmental Waters

Autor: Noriko Hata, Shigeru Taguchi, Issei Kasahara

Publikováno v: Journal of Ion Exchange. 14:321-324

High enrichment/determination system was proposed for environmental trace analyses. Micro organic ion-associate phase (IAP) was formed in situ from an aqueous sample. A trace analyte converted into hydrophobic species or an originally hydrophobic tra

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::17dd04b365c395790bfb9a4b672370a9
https://doi.org/10.5182/jaie.14.supplement_321

Zobrazit plný text záznamu

Simple and Rapid On-site Analysis of Sub Microgram Phosphate in Environmental Water by Tristimulus Colorimetry Coupled with Preconcentration with Membrane Filter Collection

Autor: Shigeru Taguchi, Noriko Hata, Issei Kasahara, Aya Fujinawa

Publikováno v: Journal of Ion Exchange. 14:317-320

Phosphate ion at the levels of sub microgram per liter were converted to hydrophobic species and this species was retained on a membrane after filtration under reduced pressure by a hydrophobic interaction between the species, ion pair or ion associa

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::66f99bafef7d984d68a4be1b711e27f9
https://doi.org/10.5182/jaie.14.supplement_317

Zobrazit plný text záznamu

Extraction and Separation of Cationic Surfactants from River Sediments: Application to a Spectrophotometric Determination of Cationic Surfactant in an Aquatic Environment Using Membrane Filters

Autor: Tetsuya Hase, Shigeru Taguchi, Hui-Feng Sun, Noriko Hata, Issei Kasahara

Publikováno v: Analytical Sciences. 17:1291-1294

The quantitative extraction of cationic surfactant (CS+) in river sediments was studied. Further, the developed method was applied to the spectrophotometric determination of CS+ in urban river sediment samples by solid-phase extraction with membranes

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1b9a7fb009f6c538c0efcb4b3bf44752
https://doi.org/10.2116/analsci.17.1291

Zobrazit plný text záznamu

X-ray fluorescence spectrometric determination of sulfur-containing anionic surfactants in water after their enrichment on a membrane filter as an ion-pair complex with a cationic surfactant

Autor: Shigeru Taguchi, Noriko Hata, Kenji Takahashi, Issei Kasahara

Publikováno v: The Analyst. 126:2078-2081

Anionic surfactants containing sulfur in their structure were enriched on a mixed cellulose ester membrane filter (MF) by filtration as an ion-pair complex with a cationic surfactant. After their enrichment, the anionic surfactants were determined by

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9fdf75f3b8c2d4e0a7796514badfe216
https://doi.org/10.1039/b105459g

Zobrazit plný text záznamu

Interpretation by the Solvophobic Theory on the Linear Additive Representation of the Logarithm of Ion-Pair Extraction Constant with Individual Contributions of Cation, Anion, and Organic Solvent

Autor: Kanji Miyabe, Katsumi Goto, and Issei Kasahara, Shigeru Taguchi

Publikováno v: The Journal of Physical Chemistry B. 104:8481-8490

A theoretical basis was given for the linear additive representation of the logarithm of ion-pair solvent extraction constant (Kex) in terms of logarithmic values of three individual extraction constants (Kcation, Kanion, and Ksolvent) for cations, a

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::a3af161949a52c836896bf7a00b828c9
https://doi.org/10.1021/jp000918c

Zobrazit plný text záznamu

Down-Sizing in Analytical Chemistry. Design of simple and sensitive methods for trace analysis by means of concentration with a membrane filter

Autor: Shigeru Taguchi, Issei Kasahara, Noriko Hata, Hui-Feng Sun

Publikováno v: BUNSEKI KAGAKU. 49:941-952

メンブランフィルターを用いる水中の微量成分の新しい濃縮/定量法を分析化学におけるダウンサイジングの観点からまとめた。この方法では,目的成分をまず化学反応によって疎水性の�

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::1ed422b346d08d2573a1f04a22589f6f
https://doi.org/10.2116/bunsekikagaku.49.941

Zobrazit plný text záznamu

Membrane solubilization with tetramethylammonium hydroxide for the preconcentration and electrothermal atomic absorption spectrometric determination of trace amounts of arsenic in water

Autor: Noriko Hata, Issei Kasahara, Hiromi Yamada, Shigeru Taguchi

Publikováno v: The Analyst. 124:23-26

Solubilization of a mixed cellulose ester membrane filter (MF) with tetramethylammonium hydroxide (TMAH) is proposed for the preconcentration and electrothermal atomic absorption spectrometric (ETAAS) determination of trace amounts of arsenic in wate

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::93c8548841a46ddc5d4acd0f858dc07b
https://doi.org/10.1039/a806856i

Zobrazit plný text záznamu

A transparent membrane filter for the solid-phase spectrophotometric determination of trace cationic surfactant in water

Autor: Y. Sengoku, K. Morisaku, Issei Kasahara, Shigeru Taguchi

Publikováno v: The Analyst. 124:1489-1492

The use of a transparent membrane filter is proposed for a simple and rapid solid-phase spectrophotometric determination of trace cationic surfactant in water. Cationic surfactant is retained on the membrane filter during filtration as an ion-pair wi

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::be9d773b696a27ca432471474f1d56eb
https://doi.org/10.1039/a904350k

Zobrazit plný text záznamu

Vyhledávací nástroje:

Upřesnit hledání