Výsledky vyhledávání - "Koichi Oguma"

Simultaneous determination of vanadium(IV) and vanadium(V) by flow injection analysis using kinetic spectrophotometry with Xylenol Orange

Autor: Osamu Yoshioka, Koichi Oguma, Hiroki Sakurai, Junji Noro

Publikováno v: Talanta. 96:44-49

A flow injection method of analysis has been developed for the simultaneous determination of V(IV) and V(V) using the difference in the rate of complex formation between vanadium in two different oxidation states and Xylenol Orange in acidic media. T

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d738f0390ca4ea35d485a64a7cf2e403
https://doi.org/10.1016/j.talanta.2012.01.062

Zobrazit plný text záznamu

Determination of uranium in seawater by flow-injection preconcentration on dodecylamidoxime-impregnated resin and spectrophotometric detection

Autor: Toshihiro Suzuki, Koichi Oguma, Kyoichi Saito

Publikováno v: Talanta. 84:1209-1214

A flow injection method has been developed for the determination of uranium in seawater combining the on-line preconcentration with spectrophotometric detection. An aliquot (10 mL) of the seawater sample adjusted to pH 5.5 was injected into the analy

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8d0f469d4d2d8846ae6ddd89f3380f23
https://doi.org/10.1016/j.talanta.2010.12.020

Zobrazit plný text záznamu

Solid–phase Extraction of Nickel Dimethylglyoximato Complex and Its Application to Determination of Nickel in Steel by Atomic Absorption Spectrometry

Autor: Takayasu Izumi, Junji Noro, Hiroki Sakurai, Koichi Oguma

Publikováno v: Tetsu-to-Hagane. 97:48-53

A solid-phase extraction method has been developed for the selective separation of nickel and applied to the determination of nickel in lead free-cutting steel. An appropriate amount of sample was dissolved in a mixture of hydrochloric acid, nitric a

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::cd3289152f0709b2b7ac43fd56eb06ca
https://doi.org/10.2355/tetsutohagane.97.48

Zobrazit plný text záznamu

Determination of traces of palladium in stream sediment and auto catalyst by FI-ICP-OES using on-line separation and preconcentration with QuadraSil TA

Autor: Masashi Ohno, Junichi Nakajima, Koichi Oguma, Katsumi Chikama, Tatsuya Seki

Publikováno v: Talanta. 79:1050-1054

A flow injection analysis (FIA) method using on-line separation and preconcentration with a novel metal scavenger beads, QuadraSil TA, has been developed for the ICP-OES determination of traces of palladium. QuadraSil TA contains diethylenetriamine a

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::381d0654f9325c101a02444c10a6d0e4
https://doi.org/10.1016/j.talanta.2009.02.035

Zobrazit plný text záznamu

Separation selectivity of aqueous polyethylene glycol-based separation systems: DSC, LC and aqueous two-phase extraction studies

Autor: Takayuki Baba, Ryosaku Sakamoto, Shingo Saito, Masami Shibukawa, Koichi Oguma, Ryoichi Ichikawa

Publikováno v: Polymer. 49:4168-4173

The distribution behavior of n-alcohols, ketones and nitroalkanes in aqueous liquid chromatography with a column packed with polyethylene glycol (PEG) gel, TSKgel Ether-250, was compared with that in aqueous two-phase systems (ATPSs) formed from PEG

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::17b8431bd10a729515409dd92c547435
https://doi.org/10.1016/j.polymer.2008.07.042

Zobrazit plný text záznamu

Oxygen-flask Combustion with Light Beam Ignition

Autor: Masanori Fujinami, Koichi Oguma, Noboru Ebihara, Tetsuo Uchida, Hiroki Sakurai

Publikováno v: Analytical Sciences. 24:283-287

A robust oxygen-flask combustion system was developed using light beam ignition. An appropriate amount of environmental sample was wrapped with a small piece of filter paper and held in a basket made of platinum-zirconium spiral. After the sample was

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1682dfb8102fd62c2d0bdd8da652676d
https://doi.org/10.2116/analsci.24.283

Zobrazit plný text záznamu

Vyhledávací nástroje:

Upřesnit hledání