Zobrazeno 1 - 10
of 148
pro vyhledávání: '"Genkichi NAKAGAWA"'
Publikováno v:
Talanta. 42:789-795
The partition of benzoic acid between 0.1 M perchloric acid solution and two kinds of mixed solvents has been carried out at 25°C. The partition and dimerization constants of benzoic acid have been determined in the 1-octanol-benzene and 2-octanone-
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7af28158ba5e847c86407792a268f892
https://doi.org/10.1016/0039-9140(95)01480-y
https://doi.org/10.1016/0039-9140(95)01480-y
Publikováno v:
Analytica Chimica Acta. 294:69-74
The retention behaviour of Cu(II), Co(III), Ni(II) and Fe(II) chelates with 2-(5-bromo-2-pyridylazo)-5-[N-propyl-N-(3-sulphopropyl) amino]phenol (5-Br-PAPS) and 2-(5-nitro-2-pyridylazo)-5-[N-propyl-N-(3-sulphopropyl)amino]-phenol (nitro-PAPS) in ion-
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f4317dbb08ee2923a5ec5627386d7672
https://doi.org/10.1016/0003-2670(94)85047-x
https://doi.org/10.1016/0003-2670(94)85047-x
Autor:
Muneyoshi Matsushita, Chizuko Ohtsuka, Hiromichi Yamada, Genkichi Nakagawa, Takashi Yasui, Hiroko Wada, Akio Yuchi
Publikováno v:
Journal of Chromatography A. 657:87-93
Two columns (50 mm × 4.6 mm I.D.) packed with sulphonated styrene-divinylbenzene (PS-DVB) gel (particle size 10 μm) and sulphonated silica gel (particle size 5 μm) were used for the separation of alkaline earth metal and several transition metal i
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::67ad06865e7ce3ece2b7780eefa473c7
https://doi.org/10.1016/0021-9673(93)83038-t
https://doi.org/10.1016/0021-9673(93)83038-t
Publikováno v:
Bulletin of the Chemical Society of Japan. 66:3377-3381
The complexation equilibria of divalent and lanthanoid metal ions with 1,2-bis(o-aminophenoxy)ethane-N,N,N′,N′-tetraacetic acid (BAPTA) and 2-[(2-amino-5-methylphenoxy)methyl]-6-methoxy-8-aminoquinoline-N,N,N′,N′-tetraacetic acid (quin2) were
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::fe2c0cd3be37bd89727daa6d99a16944
https://doi.org/10.1246/bcsj.66.3377
https://doi.org/10.1246/bcsj.66.3377
Autor:
Hiroko Wada, Genkichi Nakagawa, Tomosuke Ishizuki, Akio Yuchi, Masayoshi Tsuzuki, Tadao Ozawa
Publikováno v:
Analytica Chimica Acta. 272:161-167
2-[2-(4-Methylquinolyl)azo]-5-diethylaminophenol (QADP) was synthesized and the acidity constants of the reagent in 50% (v/v) ethanol and reactions with various metal ions were studied. QADP and its chelates are extracted into chloroform and the mola
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1ce658431a27ceed3ac7a4885a72f0e2
https://doi.org/10.1016/0003-2670(93)80388-2
https://doi.org/10.1016/0003-2670(93)80388-2
Publikováno v:
Analyst. 118(2):219-222
An equimolar mixture of zirconium(IV) and Semi-Xylenol Orange (SXO) reacts rapidly with fluoride ion at pH2 to cause an increase in absorbance at about 530 nm. The calibration graph was linear up to 1 × 10–5 mol dm–3. In a flow injection system,
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::efc000f3370efda4bf4171fae778a123
http://id.nii.ac.jp/1476/00004182/
http://id.nii.ac.jp/1476/00004182/
Publikováno v:
Bulletin of the Chemical Society of Japan. 65:3362-3373
Nickel(II) has been extracted with 2-methyl-8-quinolinol (Hmq) into chloroform under the following conditions: CNi = 2 × 10−5–4 × 10−3; CHmq = 7.5 × 10−3–4.8 × 10−1 mol dm−3; supporting electrolyte...
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8abaffdde221e04373fbe6150052b493
https://doi.org/10.1246/bcsj.65.3362
https://doi.org/10.1246/bcsj.65.3362
Publikováno v:
Analytica Chimica Acta. 261:275-279
2-[(2-Amino-5-methylphenoxy)methyl]-6-methoxy-8-aminoquinoline- N,N,N′,N′ -tetraacetic acid (Quin 2) reacts with calcium ion to form a fluorescent complex (λ(ex) 328 nm, λ(em) 496 nm). Calcium in brine could be determined with Quin 2 in the pre
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::23dbda4b972ac50483ad3ad06dd24930
https://doi.org/10.1016/0003-2670(92)80202-i
https://doi.org/10.1016/0003-2670(92)80202-i
Publikováno v:
Journal of Chromatography A. 596:73-78
The reversed-phase high-performance liquid chromatography of 8-quinolinethiol (Hqt) complexes of Fe, Co, Ni, Cu, Zn, Hg and Pb on an octadecyl-bonded silica gel stationary phase was examined. The Pb complex dissociated in the column. The retention an
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d7f23caab41c764b7c4414bb93afe8cd
https://doi.org/10.1016/0021-9673(92)80204-8
https://doi.org/10.1016/0021-9673(92)80204-8
Autor:
Kyoko Yamada, Hirofumi Isoyama, Chuzo Iida, Kyoko Oguchi, Hiroshi Sugie, Genkichi Nakagawa, Tetsuo Uchida
Publikováno v:
Analytica Chimica Acta. 256:277-284
The combined use of tetramethylammonium hydroxide (TMAH) and ethylenediaminetetraacetic acid (EDTA) was effective for leaching inorganic constituents from botanical samples for their determination by inductively coupled plasma atomic emission spectro
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::269b6c9c9006874b188d5e0893eb3c2f
https://doi.org/10.1016/0003-2670(92)85355-a
https://doi.org/10.1016/0003-2670(92)85355-a