Keizo HIRAKI

492 total citations
50 papers, 399 citations indexed

About

Keizo HIRAKI is a scholar working on Analytical Chemistry, Nutrition and Dietetics and Environmental Chemistry. According to data from OpenAlex, Keizo HIRAKI has authored 50 papers receiving a total of 399 indexed citations (citations by other indexed papers that have themselves been cited), including 19 papers in Analytical Chemistry, 12 papers in Nutrition and Dietetics and 8 papers in Environmental Chemistry. Recurrent topics in Keizo HIRAKI's work include Analytical chemistry methods development (18 papers), Selenium in Biological Systems (11 papers) and Electrochemical Analysis and Applications (5 papers). Keizo HIRAKI is often cited by papers focused on Analytical chemistry methods development (18 papers), Selenium in Biological Systems (11 papers) and Electrochemical Analysis and Applications (5 papers). Keizo HIRAKI collaborates with scholars based in Japan, Spain and United States. Keizo HIRAKI's co-authors include Yasuharu NISHIKAWA, Yuzuru Nakaguchi, Tsunenobu Shigematsu, Tatsuo Aono, Xiaonan Dong, Hiroshi Hirayama, Minoru Nakata, Yasuhiro Suzuki, Toshihiro Shirasaki and Takashi Nishimura and has published in prestigious journals such as Analytica Chimica Acta, Journal of Environmental Quality and Bulletin of the Chemical Society of Japan.

In The Last Decade

Keizo HIRAKI

50 papers receiving 359 citations

Peers

Countries citing papers authored by Keizo HIRAKI

Since Specialization

Citations

This map shows the geographic impact of Keizo HIRAKI's research. It shows the number of citations coming from papers published by authors working in each country. You can also color the map by specialization and compare the number of citations received by Keizo HIRAKI with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Keizo HIRAKI more than expected).

Fields of papers citing papers by Keizo HIRAKI

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Keizo HIRAKI. Nodes represent research fields, and links connect fields that are likely to share authors. Colored nodes show fields that tend to cite the papers produced by Keizo HIRAKI. The network helps show where Keizo HIRAKI may publish in the future.

Co-authorship network of co-authors of Keizo HIRAKI

This figure shows the co-authorship network connecting the top 25 collaborators of Keizo HIRAKI. A scholar is included among the top collaborators of Keizo HIRAKI based on the total number of citations received by their joint publications. Widths of edges represent the number of papers authors have co-authored together. Node borders signify the number of papers an author published with Keizo HIRAKI. Keizo HIRAKI is excluded from the visualization to improve readability, since they are connected to all nodes in the network.

All Works

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20 of 20 papers shown

#	Work	Indexed citations
1	Determination of Chromium, Copper, Iron, Manganese and Lead in Human Hair by Graphite Furnace Atomic Absorption Spectrometry 1998 ·Analytical Sciences ·Xiaonan Dong, Yuzuru Nakaguchi, Keizo HIRAKI	11
2	Determination of arsenic and selenium in biological samples by microwave-in-duced plasma mass spectrometry. 1995 ·BUNSEKI KAGAKU ·Toshihiro Shirasaki, Keizo HIRAKI	1
3	Determination of lead in river water by graphite furnace AAS with cobalt(II) nitrate-ammonium dihydrogenphosphate as matrix modifier. 1994 ·BUNSEKI KAGAKU ·Toshihiro Shirasaki, Hiroko Nakamura, Keizo HIRAKI	2
4	Determination of trace elements in a photoresist solution by microwave-induced plasma mass spectrometry. 1994 ·BUNSEKI KAGAKU ·Toshihiro Shirasaki, Keizo HIRAKI	1
5	Species determination of selenium in marine plankton body fluid. 1993 ·BUNSEKI KAGAKU ·(unknown), Yuzuru Nakaguchi, Keizo HIRAKI	3
6	Determination of thorium in phosphate minerals by solvent extraction-ICP atomic emission spectrometry. 1989 ·NIPPON KAGAKU KAISHI ·Osamu Fujino, Masakazu Matsui, Shigeo Umetani, Keizo HIRAKI	1
7	Distribution and determination of manganese in clam shell by graphite furnace-atomic absorption spectrometry and neutron activation analysis. 1988 ·NIPPON KAGAKU KAISHI ·Osamu Fujino, Masakazu Matsui, (unknown), Yuzuru Nakaguchi, Keizo HIRAKI	2
8	Separation of Selenide Constituents from Selenide Samples Containing Elemental Selenium 1982 ·Bulletin of the Chemical Society of Japan ·(unknown), Keizo HIRAKI, Yasuharu NISHIKAWA	4
9	Fluorometric determination of selenium in sediments with 2, 3-diaminonaphthalene 1979 ·BUNSEKI KAGAKU ·(unknown), Keizo HIRAKI, Yasuharu NISHIKAWA	10
10	Simultaneous fluorimetric determination of 8-quinolinol and 5,7-dihalo-8-quinolinols by differences in their fluorescence lifetimes 1979 ·Analytica Chimica Acta ·(unknown), (unknown), Keizo HIRAKI, Yasuharu NISHIKAWA	3
11	Simultaneous fluorometric determination of humic acid and lignine sulfonate 1979 ·BUNSEKI KAGAKU ·(unknown), Keizo HIRAKI, Yasuharu NISHIKAWA	5
12	1978 ·NIPPON KAGAKU KAISHI ·(unknown), Keizo HIRAKI, (unknown), Yasuharu NISHIKAWA	10
13	Simultaneous determinations of metal 5-sulfo-8-quinolinolates by differences in their fluorescence lifetimes 1978 ·Analytica Chimica Acta ·Keizo HIRAKI, (unknown), Yasuharu NISHIKAWA	27
14	Fluorometric determination of selenium (IV) and selenium (VI) in sea water and river water 1977 ·BUNSEKI KAGAKU ·(unknown), Keizo HIRAKI, Yasuharu NISHIKAWA, Tsunenobu Shigematsu	25
15	Fluorescence properties of groups II and III metallo-5-sulfo-8-quinolinolates and their use in analytical chemistry 1977 ·BUNSEKI KAGAKU ·Yasuharu NISHIKAWA, Keizo HIRAKI, (unknown), (unknown)	17
16	Metal Chelates of Aromatic o , o ′-Dihydroxyazo Compounds. I. The Fluorescence Properties of the Metal Chelates of o , o ′-Dihydroxyazobenzene and Their Use in Fluorometry 1973 ·Bulletin of the Chemical Society of Japan ·Keizo HIRAKI	3
17	Fluorometric Determination of Aluminum and Gallium with Superchrome Garnet Y 1972 ·Bulletin of the Chemical Society of Japan ·Keizo HIRAKI	6
18	Fluorometric determination of pentose with anthrone 1971 ·BUNSEKI KAGAKU ·Hiroshi Hirayama, Keizo HIRAKI, Yasuharu NISHIKAWA	6
19	Fluorometric determination of tin with Rhodamine B 1970 ·BUNSEKI KAGAKU ·Yasuharu NISHIKAWA, Keizo HIRAKI, Takeshi Naganuma, (unknown)	2
20	Spectrophotometric Determination of Scandium with Oxine or its Dihalogeno-derivatives 1962 ·Nippon kagaku zassi ·Yasuharu NISHIKAWA, Keizo HIRAKI, (unknown), Tsunenobu Shigematsu	2

Rankless uses publication and citation data sourced from OpenAlex, an open and comprehensive bibliographic database. While OpenAlex provides broad and valuable coverage of the global research landscape, it—like all bibliographic datasets—has inherent limitations. These include incomplete records, variations in author disambiguation, differences in journal indexing, and delays in data updates. As a result, some metrics and network relationships displayed in Rankless may not fully capture the entirety of a scholar's output or impact.

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