Výsledky vyhledávání - "Kikuo Terada"

Spectrophotometric Determination of Cobalt(II) in Water after Preconcentration by Sorption of Its Nitroso R Complex with Poly(chlorotrifluoroethylene) Resint

Autor: Li-Ping Zhang, Kikuo Terada

Publikováno v: Analytical Sciences. 10:161-165

A simple and rapid method has been established for spectrophotometric determination of cobalt(II) in water after preconcentration by sorbing the nitroso R (sodium-1-nitroso-2-hydroxynaphthalene-3, 6-disulfonate) complex of cobalt(II) on poly(chlorotr

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::ba27a4e9ca5375978550aad73668ab0f
https://doi.org/10.2116/analsci.10.161

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Preconcentration and Determination of a Trace Amount of Manganese as Its Thenoyltrifluoroacetone Complex with Dibenzo-18-crown-6 by Means of Synergistic Extraction and Atomic Absorption Spectrometry

Autor: M. Billah, Takaharu Honjo, Kikuo Terada

Publikováno v: Analytical Sciences. 9:251-254

A new method for the preconcentration and determination of trace amounts of manganese at the ppb-sub ppb level in natural water is described. The method is based on the formation of the thenoyltrifluoroacetone (TTA) complex with dibenzo-18-crown-6 (D

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::9839deeed602ce9c77e36aabb07c8696
https://doi.org/10.2116/analsci.9.251

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Separation and determination of trace amounts of barium as its thenoyltrifluoroacetone complex with dibenzo-18-crown-6 by means of synergistic extraction and flame photometry

Autor: Takaharu Honjo, Kikuo Terada, M. Billah

Publikováno v: Fresenius' Journal of Analytical Chemistry. 347:107-110

A new method for the separation and determination of trace amounts of barium at the ppb-ppm level in water as its thenoyltrifluoroacetone (TTA) complex with dibenzo-18-crown-6 (DB18C6) comprises synergistic extraction and back extraction combined wit

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::70dc30279be58764daf0507677236e7a
https://doi.org/10.1007/bf00322839

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Preconcentration of Trace Metals as Their Complexes on Poly(chlorotrifluoroethylene) Resin

Autor: Kikuo Terada, Zhang Liping, Ken Matsumoto, Takashi Yamaguchi

Publikováno v: Analytical Sciences. 8:851-855

Poly(chlorotrifluoroethylene) resin (PCTFE) was found to adsorb some metal complexes, such as the complexes of Cd(II), Cu(II), Fe(III), Mn(II), Ni(II), and Zn(II) with 8-quinolinol and of Ag(I), Cd(II) and Cu(II) with Bismuthiol II (Bis II), and ion-

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::38234e06808c608fb9f1387ed431c89c
https://doi.org/10.2116/analsci.8.851

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Preconcentration of Trace Elements by Sorption

Autor: Kikuo Terada

Publikováno v: Analytical Sciences. 7:187-198

In the determination of trace elements in complex matrices, enrichment and separation of the analytes is of special importance. A wide variety of methods have been proposed for preconcentration according to the nature of the samples, the types and co

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::cd6d2fa948f1ee237b1087adf4c15ed5
https://doi.org/10.2116/analsci.7.187

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Preconcentration of Gold (III), Palladium (II) and Ruthenium (III) with Dithio-Carbamate-Chitin

Autor: Hiroo Kawamura, Kikuo Terada

Publikováno v: Analytical Sciences. 7:71-74

Dithiocarbamate-chitin (DTC-chitin) has been synthesized and used for concentration of gold (III), palladium (II) and ruthenium (III) from an acidic solution. The former two metals were quantitatively retained on the polymer from 6 M hydrochloric aci

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8defdfc17b5d016cdf391fd15a73bc79
https://doi.org/10.2116/analsci.7.supple_71

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Separation and Determination of a Trace Amount of Lithium as its Thenoyltrifluoroacetone Complex with 12-Crown-4 by Means of Synergic Extraction and Flame Photometry

Autor: Tatsuo Itoh, Takaharu Honjo, Kikuo Terada, Mokarram Billah

Publikováno v: Analytical Sciences. 7:47-50

A new method for the separation and determination of a trace amount of lithium in ppb∼ppm level in water as its thenoyltrifluoroacetone (TTA) complex with 12-crown-4 (12C4) has been established by means of synergic extraction and back extraction co

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::cdd7d38e75f6da2964ca31836b0ae09b
https://doi.org/10.2116/analsci.7.supple_47

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Preconcentration of Trace Metals with Dithiocarbamate-Chitin

Autor: Akiko Hase, Kikuo Terada, Toshie Kawabata

Publikováno v: Analytical Sciences. 6:747-751

Dithiocarbamate-chitin (DTC-chitin) is synthesized by mixing chitin powder with carbon disulfide, 2-propanol and tetramethylammonium hydroxide in benzene. The DTC-chitin contains about 0.7% of sulfur, and the IR spectra of the DTC-chitin exhibit a sm

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::c2a48e50e0a1449456a82d38cf379875
https://doi.org/10.2116/analsci.6.747

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