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1

Indirect determination of fluoride by EDTA back-titration of lanthanum

Kunio Murase, Genkichi Nakagawa, Kazunobu Kodama, Naosuke Shiraishi

Journal:

Year:

1977

Language:

english

File:

PDF, 353 KB

english, 1977

2

Packed microcapillary liquid chromatography with reduced I.D. columns

Takao Tsuda, Isao Tanaka, Genkichi Nakagawa

Journal:

Journal of Chromatography A

Year:

1982

Language:

english

File:

PDF, 459 KB

english, 1982

3

Chromatographic behaviour of 2-(2-pyridylazo)-5-[N-(sulphoalkyl)amino]phenol chelates on hydrophobic stationary phases

Chizuko Ohtsuka, Kimiyo Matsuzawa, Hiroko Wada, Genkichi Nakagawa

Journal:

Analytica Chimica Acta

Year:

1991

Language:

english

File:

PDF, 594 KB

english, 1991

4

Direct determination of copper in serum by flow-injection analysis

Hiroko Wada, Xiao Jing Zhou, Tomosuke Ishizuki, Hiromichi Yamada, Genkichi Nakagawa

Journal:

Analytica Chimica Acta

Year:

1992

Language:

english

File:

PDF, 237 KB

english, 1992

5

Flow-injection fluorimetric determination of traces of calcium in brine

Hiroko Wada, Hiromichi Atsumi, Genkichi Nakagawa

Journal:

Analytica Chimica Acta

Year:

1992

Language:

english

File:

PDF, 367 KB

english, 1992

6

Characterization of 2-(2-pyridylazo)-5-[N-(sulphoalkyl)amino]phenol derivatives as the precolumn chelating agent for trace metal determination by ion-pair reversed-phase liquid chromatography with spectrophotometric detection

Chizuko Ohtsuka, Kimiyo Matsuzawa, Hiroko Wada, Genkichi Nakagawa

Journal:

Analytica Chimica Acta

Year:

1992

Language:

english

File:

PDF, 389 KB

english, 1992

7

Determination of twelve elements in botanical samples with inductively coupled plasma atomic emission spectrometry after leaching with tetramethylammonium hydroxide and ethylenediaminetetraacetic acid

Tetsuo Uchida, Hirofumi Isoyama, Kyoko Yamada, Kyoko Oguchi, Genkichi Nakagawa, Hiroshi Sugie, Chuzo Iida

Journal:

Analytica Chimica Acta

Year:

1992

Language:

english

File:

PDF, 689 KB

english, 1992

8

Synthesis of 2-[2-(4-methylquinolyl)azo]-5-diethylaminophenol and its use for the spectrophotometric determination of nickel

Tomosuke Ishizuki, Masayoshi Tsuzuki, Akio Yuchi, Tadao Ozawa, Hiroko Wada, Genkichi Nakagawa

Journal:

Analytica Chimica Acta

Year:

1993

Language:

english

File:

PDF, 492 KB

english, 1993

9

Retention behaviour of metal chelates in ion-pair reversed-phase liquid chromatography as a function of mobile phase composition with methanol-water and acetonitrile-water mobile phases

Chizuko Ohtsuka, Kimiyo Matsuzuwa, Hiroko Wada, Genkichi Nakagawa

Journal:

Analytica Chimica Acta

Year:

1994

Language:

english

File:

PDF, 517 KB

english, 1994

10

Reversed-phase high-performance liquid chromatography of several metal-8-quinolinethiol complexes

Takashi Yasui, Akio Yuchi, Hiroko Wada, Genkichi Nakagawa

Journal:

Journal of Chromatography A

Year:

1992

Language:

english

File:

PDF, 472 KB

english, 1992

11

Ion chromatography of alkaline earth and heavy metal ions by on-column derivatization with bisazochromotropic acid

Hiroko Wada, Muneyoshi Matsushita, Takashi Yasui, Akio Yuchi, Hiromichi Yamada, Genkichi Nakagawa, Chizuko Ohtsuka

Journal:

Journal of Chromatography A

Year:

1993

Language:

english

File:

PDF, 520 KB

english, 1993

12

Preconcentration and determination of calcium and magnesium in brine with flow-injection systems

Hiroko Wada, Heisuke Askura, Gogineni Venkata Rattaiah, Genkichi Nakagawa

Journal:

Analytica Chimica Acta

Year:

1988

Language:

english

File:

PDF, 449 KB

english, 1988

13

Equilibrium study on the masking of aluminium ion in the determination of fluoride with ion-selective electrodes

Akio Yuchi, Kazuhiro Ueda, Hiroko Wada, Genkichi Nakagawa

Journal:

Analytica Chimica Acta

Year:

1986

Language:

english

File:

PDF, 394 KB

english, 1986

14

Spectrophotometric determination of magnesium by flow injection analysis with a ligand buffer for masking calcium

Hiroko Wada, Akio Yuchi, Genkichi Nakagawa

Journal:

Analytica Chimica Acta

Year:

1983

Language:

english

File:

PDF, 360 KB

english, 1983

15

The performance of a cadmium ion-selective electrode in metal buffer solutions and the determination of the stability constants of cadmium complexes

Akio Yuchi, Hiroko Wada, Genkichi Nakagawa

Journal:

Analytica Chimica Acta

Year:

1983

Language:

english

File:

PDF, 518 KB

english, 1983

16

Preparation and examination of calcium ion-selective electrodes for flow analysis

Hiroko Wada, Tadao Ozawa, Genkichi Nakagawa, Yasukazu Asano, Satoshi Ito

Journal:

Analytica Chimica Acta

Year:

1988

Language:

english

File:

PDF, 495 KB

english, 1988

17

Anion-selective properties of alkali metal-free lead phosphate glasses containing silver chloride and their application in an ion-selective electrode

Tsuyoshi Nomura, Kanji Masui, Genkichi Nakagawa

Journal:

Analytica Chimica Acta

Year:

1990

Language:

english

File:

PDF, 433 KB

english, 1990

18

Reversed-phase ion-pair partition liquid chromatography of chelates with 2-(3,5-dibromo-2-pyridylazo)-5-[N-ethyl-N-(3-sulphopropyl) amino] phenol and analogues

Chizuko Ohtsuka, Hiroko Wada, Tomosuke Ishizuki, Genkichi Nakagawa

Journal:

Analytica Chimica Acta

Year:

1989

Language:

english

File:

PDF, 507 KB

english, 1989

19

Synthesis of some antipyrinylazo and thiazolylazo compounds with pentan-2,4-dione and their reactions with metal ions

Tomosuke Ishizuki, Hiroko Wada, Genkichi Nakagawa

Journal:

Analytica Chimica Acta

Year:

1988

Language:

english

File:

PDF, 489 KB

english, 1988

20

General considerations in compleximetric titrations

Motoharu Tanaka, Genkichi Nakagawa

Journal:

Analytica Chimica Acta

Year:

1965

Language:

english

File:

PDF, 1.06 MB

english, 1965

21

General considerations in the acid-base titrations in glacial acetic acid : An extension of the concept of ligand buffer

Motoharu Tanaka, Genkichi Nakagawa

Journal:

Analytica Chimica Acta

Year:

1965

Language:

english

File:

PDF, 702 KB

english, 1965

22

Open-tubular microcapillary liquid chromatography with 20-μm I.D. columns

Takao Tsuda, Katsuyoshi Tsuboi, Genkichi Nakagawa

Journal:

Journal of Chromatography A

Year:

1981

Language:

english

File:

PDF, 464 KB

english, 1981

23

Separation of chloro complexes of metals by micro-high-performance liquid chromatography

Takao Tsuda, Takashi Nozu, Genkichi Nakagawa

Journal:

Journal of Chromatography A

Year:

1982

Language:

english

File:

PDF, 437 KB

english, 1982

24

Open-tubular microcapillary liquid chromatography with electro-osmosis flow using a UV detector

Takao Tsuda, Kazuhiro Nomura, Genkichi Nakagawa

Journal:

Journal of Chromatography A

Year:

1982

Language:

english

File:

PDF, 422 KB

english, 1982

25

Reversed-phase ion-pair partition chromatography of iron, cobalt and nickel chelates with 4-hydroxy-3-(2-pyridylazo)naphthalene-1-sulphonic acid

Hiroko Wada, Shinji Nezu, Tadao Ozawa, Genkichi Nakagawa

Journal:

Journal of Chromatography A

Year:

1984

Language:

english

File:

PDF, 463 KB

english, 1984

26

Open-tubular microcapillary liquid chromatography with 30–40 μm I.D. columns

Takao Tsuda, Genkichi Nakagawa

Journal:

Journal of Chromatography A

Year:

1980

Language:

english

File:

PDF, 650 KB

english, 1980

27

Separation of organic and metal ions by high-voltage capillary electrophoresis

Takao Tsuda, Kazuhiro Nomura, Genkichi Nakagawa

Journal:

Journal of Chromatography A

Year:

1983

Language:

english

File:

PDF, 488 KB

english, 1983

28

Open-tubular liquid chromatography with 5–10-μm I.D. Columns

Takao Tsuda, Genkichi Nakagawa

Journal:

Journal of Chromatography A

Year:

1983

Language:

english

File:

PDF, 378 KB

english, 1983

29

Tensammetric determination of microgram amounts of EDTA using a catalytic oxidation of 2-amino-4-methylphenol with vanadium

Tsuyoshi Nomura, Genkichi Nakagawa

Journal:

Journal of Electroanalytical Chemistry and Interfacial Electrochemistry

Year:

1980

Language:

english

File:

PDF, 280 KB

english, 1980

30

Simultaneous determination of iron and copper ions by low-injection analysis with a multichannel photodiode-array detector

Hiroko Wada, Tomoaki Murakawa, Genkichi Nakagawa

Journal:

Analytica Chimica Acta

Year:

1987

Language:

english

File:

PDF, 415 KB

english, 1987

31

Potentiometric investigation of complex formation of lead(II) with glycine and dl-alanine

Masunobu Maeda, Yoshihiro Tanaka, Genkichi Nakagawa

Journal:

Journal of Inorganic and Nuclear Chemistry

Year:

1979

Language:

english

File:

PDF, 420 KB

english, 1979

32

Potentiometric investigation of complex formation of Pb(II) with 2-amino-2-methylpropanoic acid and dl-2-aminobutanoic acid

Masunobu Maeda, Yoshihiro Tanaka, Genkichi Nakagawa

Journal:

Journal of Inorganic and Nuclear Chemistry

Year:

1981

Language:

english

File:

PDF, 244 KB

english, 1981

33

Formation constants for Pb(II)-iminodiacetic acid complexes as determined by potentiometry with glass, Pb-Amalgam and lead ion-selective electrodes

Masunobu Maeda, Masaaki Ohnishi, Genkichi Nakagawa

Journal:

Journal of Inorganic and Nuclear Chemistry

Year:

1981

Language:

english

File:

PDF, 256 KB

english, 1981

34

Effects of solvation on partition and dimerization of benzoic acid in mixed solvent systems

Hiromichi Yamada, Kyoko Yajima, Hiroko Wada, Genkichi Nakagawa

Journal:

Year:

1995

Language:

english

File:

PDF, 515 KB

english, 1995

35

Quantitative treatment of exchange equilibria involving complexans—I: Polarographic determination of calcium in the presence of magnesium

Genkichi Nakagawa, Motoharu Tanaka

Journal:

Year:

1962

Language:

english

File:

PDF, 590 KB

english, 1962

36

Quantitative treatment of exchange equilibria involving complexans—I: General consideration and scope of applications in analytical chemistry

Genkichi Nakagawa, Motoharu Tanaka

Journal:

Year:

1962

Language:

english

File:

PDF, 475 KB

english, 1962

37

Quantitative treatment of exchange equilibria involving complexans—III: chelatometric determination of calcium in presence of magnesium with EGTA

Genkichi Nakagawa, Hiroko Wada, Motoharu Tanaka

Journal:

Year:

1963

Language:

english

File:

PDF, 193 KB

english, 1963

38

Quantitative treatment of exchange equilibria involving complexans-IV: Indirect photometric determination of a very small amount of calcium

Genkichi Nakagawa, Ichiro Namiki, Motoharu Tanaka

Journal:

Year:

1966

Language:

english

File:

PDF, 462 KB

english, 1966

39

Use of ligand buffers for improved selectivity in the polarographic determination of metals: Polarographic determination of zinc in the presence of a large amount of cadmium

Genkichi Nakagawa, Motoharu Tanaka

Journal:

Year:

1972

Language:

english

File:

PDF, 548 KB

english, 1972

40

Effects of auxiliary complex-forming agents on the rate of metallochromic indicator colour change

Genkichi Nakagawa, Hiroko Wada

Journal:

Year:

1973

Language:

english

File:

PDF, 358 KB

english, 1973

41

Evaluation of 1-(2-thiazolylazo)-2-hydroxy-3-naphthoic acid as a metallochromic indicator

Hiroko Wada, Osamu Nakazawa, Genkichi Nakagawa

Journal:

Year:

1974

Language:

english

File:

PDF, 360 KB

english, 1974

42

Effects of auxiliary complex-forming agents on the rate of metallochromic indicator colour change—II: Mechanism of the colour change of pan in copper-EDTA titrations

Genkichi Nakagawa, Hiroko Wada

Journal:

Year:

1975

Language:

english

File:

PDF, 328 KB

english, 1975

43

Effects of auxiliary complex-forming agents on the rate of metallochromic indicator colour-change—III: Mechanism of the colour change of tac in nickel-edta titrations

Genkichi Nakagawa, Hiroko Wada, Osamu Nakazawa

Journal:

Year:

1976

Language:

english

File:

PDF, 283 KB

english, 1976

44

Effects of auxiliary complex-forming agents on the rate of metallochromic indicator colour change-IV: Mechanism of the colour change of xylenol orange in copper(II)-edta titrations

Hiroko Wada, Tomosuke Ishizuki, Genkichi Nakagawa

Journal:

Year:

1976

Language:

english

File:

PDF, 252 KB

english, 1976

45

Tensammetric determination of microgram amounts of vanadium by catalytic oxidation of o-aminophenol.

Tsuyoshi Nomura, Genkichi Nakagawa

Journal:

Year:

1977

Language:

english

File:

PDF, 296 KB

english, 1977

46

Packed microcapillary columns with 10-.mu.m silica gel for liquid chromatography

Tsuda, Takao., Tanaka, Isao., Nakagawa, Genkichi.

Journal:

Analytical Chemistry

Year:

1984

Language:

english

File:

PDF, 1.43 MB

english, 1984

47

Mixed-ligand complexes of tetravalent metal ions with amine-N-polycarboxylates and fluoride

Yuchi, Akio, Ban, Tokihito, Wada, Hiroko, Nakagawa, Genkichi

Journal:

Inorganic Chemistry

Year:

1990

Language:

english

File:

PDF, 389 KB

english, 1990

48

Recycling nebulisation system with exchangeable spray chamber for inductively coupled plasma atomic emission spectrometry

Isoyama, Hirofumi, Uchida, Tetsuo, Iida, Chuzo, Nakagawa, Genkichi

Journal:

Journal of Analytical Atomic Spectrometry

Year:

1990

Language:

english

File:

PDF, 661 KB

english, 1990

49

Small spray chamber for inductively coupled plasma atomic emission spectrometry and its evaluation by a digital signal sampling technique

Isoyama, Hirofumi, Uchida, Tetsuo, Niwa, Takashi, Iida, Chuzo, Nakagawa, Genkichi

Journal:

Journal of Analytical Atomic Spectrometry

Year:

1989

Language:

english

File:

PDF, 651 KB

english, 1989

50

Semi-Xylenol Orange complex of zirconium(IV) as a photometric reagent system for fluoride based on mixed ligand complex formation

Yuchi, Akio, Hokari, Norihisa, Wada, Hiroko, Nakagawa, Genkichi

Journal:

The Analyst (Royal Society of Chemistry)

Year:

1993

Language:

english

File:

PDF, 515 KB

english, 1993

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