KOZAKI Daisuke

J-GLOBAL         Last updated: Sep 26, 2019 at 16:36
KOZAKI Daisuke
Kochi University
Research and Education Faculty, Multidisciplinary Science Cluster Interdisciplinary Science Unit

Research Areas


Academic & Professional Experience

Jun 2013
Jun 2016
Sinior lector, Faculty of Industrial Sciences and Technology, University Malaysia Pahang
Sep 2013
Dec 2015
Research fellow, Center for Earth Resource Research & Management, University Malaysia Pahang

Awards & Honors

Oct 2012
Preliminary study on simultaneous separation of iodide, strontium, cesium and barium ions from common ions in soil by ion-exclusion/cation-exchange chromatography, The Best Poster Presentation Award The 6th Asia-Pacific Symposium on Ion Analysis, Asia Pacific on Ion analysis

Published Papers

Daisuke Kozaki, Souma Tanihata, Atsushi Yamamoto, Nobutake Nakatani, Masanobu Mori, Kazuhiko Tanaka
Food Chemistry   274 679-685   Feb 2019
© 2018 Elsevier Ltd Multicomponent simultaneous analysis is important for management programs, which are required in beer industries because the beer constituents measure by combining several methods in the present. In response to a requirement, o...
Masanobu Mori, Tomoe Masuno, Asako Kanai, Daisuke Kozaki
Bunseki Kagaku   68 241-251   Jan 2019
© 2019 The Japan Society for Analytical Chemistry. Recently, to create a new ion chromatography (IC), the authors have been studying ion separations using zirconia (ZrO2) as a stationary phase that indicates excellent chemical and thermal resistan...
Daisuke Kozaki, Souma Tanihata, Masanobu Mori, Kazuhiko Tanaka, Atsushi Yamamoto
Bunseki Kagaku   68 253-258   Jan 2019
© 2019 The Japan Society for Analytical Chemistry. An cation-exclusion/anion-exchange chromatography (IEC/AEC) with conductimetric/UV-spectrophotometric detections for simultaneous determinations of the ionic nutrients (NO–3, NO–2, NH+4, HPO2–4 an...
Daisuke Kozaki, Norhasmira Idayu Binti Harun, Chan Hein Chong, Murni Hayati Binti Esraruddin, Nor Atiah Binti Yunus, Aini Syazana Binti Derahman, Kee Seng Pu, Nurul Syazwani binti Alias, Kumutharani A.P. Annamalai, Sarmila Nagappan, Mohd Hasbi Bin Ab Rahim, Mashitah M. Yusoff
Sustainability (Switzerland)   11    Jan 2019
© 2019 by the authors. Kuantan in Pahang, Malaysia has experienced rapid development and environmental degradation over the past decade following the implementation of The National Physical Plan 2005. To assess water quality and identify polluted ...
Sakura Yoshii, Daisuke Kozaki, Takayuki Hosokawa, Hideyuki Itabashi, Masanobu Mori
Bunseki Kagaku   68 201-206   Jan 2019
© 2019 The Japan Society for Analytical Chemistry. This study describes inorganic anions using a column packed with a diol-modified silica gel stationary phase (diol-silica; TSKgel OH-120). In an acid eluent, such as tartaric acid or malic acid, t...
Tomoharu Fujiyoshi, Takahito Ikami, Koji Kikukawa, Masato Kobayashi, Rina Takai, Daisuke Kozaki, Atsushi Yamamoto
Food Chemistry   240 386-390   Feb 2018
© 2017 Elsevier Ltd The preservatives benzoic acid and sorbic acid are generally quantified with separation techniques, such as HPLC or GC. Here we describe a new method for determining these compounds in processed food samples based on a narrown...
Daisuke Kozaki, Norhasmira Idayu Binti Harun, Mohd Hasbi Bin Ab. Rahim, Masanobu Mori, Nobutake Nakatani, Kazuhiko Tanaka
Environments   4(35) 1-15   Apr 2017   [Refereed]
© 2017 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
Yu Otsuka, Nobutake Nakatani, Takuya Takahashi, Daisuke Kozaki, Masanobu Mori, Kazuhiko Tanaka
Separations   3    Mar 2016
© 2016 by the authors; licensee MDPI, Basel, Switzerland. article distributed under the terms and conditions of the Crea. The simple and simultaneous determination of silicic, boric and carbonic acids was made using ion-exclusion chromatography (I...
Masanobu Mori, Katsuya Sagara, Kaori Arai, Nobutake Nakatani, Shin Ichi Ohira, Kei Toda, Hideyuki Itabashi, Daisuke Kozaki, Yumi Sugo, Shigeki Watanabe, Noriko S. Ishioka, Kazuhiko Tanaka
Journal of Chromatography A   1431 131-137   Jan 2016
© 2015 Elsevier B.V. Selective separation and sensitive detection of dissolved silicon and boron (DSi and DB) in aqueous solution was achieved by combining an electrodialytic ion isolation device (EID) as a salt remover, an ion-exclusion chromatog...
Daisuke Kozaki, Mohd Hasbi bin Ab. Rahim, Wan Mohd Faizal bin Wan Ishak, Mashitah M. Yusoff, Masanobu Mori, Nobutake Nakatani, Kazuhiko Tanaka
Air, Soil and Water Research   9    Jan 2016
© the authors, publisher and licensee Libertas Academica Limited. Water qualities of three suburban rivers, namely, Kuantan, Belat, and Galing rivers, in Kuantan, Malaysia, were examined effectively by using ion-exclusion/cation-exchange chromatog...
M. Mori, T. Masuno, D. Kozaki, N. Nakatani, K. Tanaka, H. Itabashi
Acta Chromatographica   27 767-773   Dec 2015
© 2014 Akadémiai Kiadó, Budapest. Ion chromatography of inorganic cations using a phosphate-coated zirconia stationary phase (PZ) was first attempted. The retentions of cations to PZ increased by elevating the column temperature and the reproducib...
Daisuke Kozaki, Takashi Ozaki, Nobutake Nakatani, Masanobu Mori, Kazuhiko Tanaka
Water (Switzerland)   6 1945-1960   Jan 2014
We evaluated the use of ion-exclusion chromatographic systems for analyzing the behavior of inorganic ions (e.g., bicarbonate, sulfate, chloride, nitrate, phosphate, dissolved silicate, sodium, ammonium, potassium, magnesium, and calcium ions) in ...
Daisuke KOZAKI, Masanobu MORI, Nobutake NAKATANI, Kaori ARAI, Tomoe MASUNO, Masakazu KOSEKI, Hideyuki ITABASHI, Kazuhiko TANAKA
Analytical Sciences   29 121-126   Jan 2013
Herein, we describe indirect UV detection-ion-exclusion/cation-exchange chromatography (IEC/CEC) on a weakly acidic cation-exchange resin in the H+-form (TSKgel Super IC-A/C) using sulfosalicylic acid as the eluent. The goal of the study was to ch...
Kaori Arai, Masanobu Mori, Daisuke Kozaki, Nobutake Nakatani, Hideyuki Itabashi, Kazuhiko Tanaka
Journal of Chromatography A   1270 147-152   Dec 2012
We describe the ion chromatographic separation of inorganic anions using a diol-stationary phase column (-CH(OH)CH2OH; diol-column) without charged functional groups. Anions were separated using acidic eluent as in typical anion-exchange chromatog...
Daisuke Kozaki, Nobutake Nakatani, Masanobu Mori, Nobukazu Nakagoshi, Kazuhiko Tanaka
Chinese Journal of Chromatography (Se Pu)   30 721-727   Jul 2012
A unified ion-exclusion chromatography IEC system for monitoring anionic and cationic nutrients like NH 4+ NO 2- NO 3- phosphate ion silicate ion and HCO 3- was developed and applied to several environmental waters. The IEC system consisted of fou...
Daisuke Kozaki, Chao Hong Shi, Kazuhiko Tanaka, Nobutake Nakatani
Chinese Journal of Chromatography (Se Pu)   30 361-364   Apr 2012
To enhance the conductivity detection sensitivity of the common anions (Na-anions) in the electrostatic ion chromatography (EIC) by elution with water, a conductivity enhancement column packed with a strongly acid cation-exchange resin in the H-fo...
Nobutake Nakatani, Daisuke Kozaki, Kazuhiko Tanaka
Chinese Journal of Chromatography (Se Pu)   30 365-368   Apr 2012
In this study, recent our work on advanced ion chromatographic methods for the simultaneous determination of inorganic ionic species such as common anions (SO42-, Cl- and NO3-) and cations (Na+, NH4+, K+, Mg2+, and Ca2+), nutrients (phosphate and ...
Masanobu Mori, Takahiro Hironaga, Hideyuki Itabashi, Nobutake Nakatani, Daisuke Kozaki, Kazuhiko Tanaka
Chinese Journal of Chromatography (Se Pu)   30 356-360   Apr 2012
Ion-exclusion/anion-exchange chromatography (IEC/AEC) on a combination of a strongly basic anion-exchange resin in the OH --form with basic eluent has been developed. This system is useful for simulaneous separation and determination of ammonium i...
Nobutake Nakatani, Daisuke Kozaki, Masanobu Mori, Kazuhiko Tanaka
Analytical Sciences   28 845-852   Jan 2012
One of the ultimate goals of ion chromatography is to determine both anions and cations found in samples with a single chromatographic run. In the present article, recent progress in ion-exclusion/ion-exchange chromatography for the simultaneous d...
Masanobu Mori, Takahiro Hironaga, Tatsuya Satori, Hideyuki Itabashi, Nobutake Nakatani, Daisuke Kozaki, Kazuhiko Tanaka
Tetsu-To-Hagane/Journal of the Iron and Steel Institute of Japan   97 273-278   May 2011
Simultaneous chromatographic separation of nitrate ion (NO3-), nitrite ion (NO2-) and ammonium ion (NH4-) was obtained using single injection, single column and a detector (conductivity). The principle is based on selective ion-exclusion effect fo...
Masanobu Mori, Takahiro Hironaga, Hiroe Kajiwara, Nobutake Nakatani, Daisuke Kozaki, Hideyuki Itabashi, Kazuhiko Tanaka
Analytical Sciences   27 505-510   Jan 2011
We developed an ion-exclusion/adsorption chromatography (IEAC) method employing a polystyrene-divinylbenzene-based weakly acidic cation-exchange resin (PS-WCX) column with propionic acid as the eluent for the simultaneous determination of multival...
Nobutake Nakatani, Daisuke Kozaki, Masanobu Mori, Kiyoshi Hasebe, Nobukazu Nakagoshi, Kazuhiko Tanaka
Analytical Sciences   27 499-504   Jan 2011
Simultaneous determinations of common inorganic anionic species (SO 42- , Cl - , NO 3- , phosphate and silicate) and cations (Na + , NH 4+ , K + , Mg 2+ and Ca 2+ ) were conducted using an ion-chromatography system with dual detection of conductiv...
Shizuko Hirata, Daisuke Kozaki, Kinya Sakanishi, Nobukazu Nakagoshi, Kazuhiko Tanaka
Analytical Sciences   26 387-390   Jan 2010
In order to characterize the ion-exclusion and cation-exchange properties of an unmodified silica-gel column, the retention behaviors of Cr(VI) and Cr(III) ions were investigated using a Develosil 30-5 (150 × 4.6mm i.d.) in the acidic region. Cr(V...
Wakako Masuda, Daisuke Kozaki, Nobutake Nakatani, Ryozo Goto, Masanobu Mori, Bunshi Fugetsu, Kazuhiko Tanaka
Bunseki Kagaku   58 311-315   Dec 2009
Electrostatic ion chromatography (EIC) of anions and cations with water eluent has been investigated for the development of water-monitoring systems in developing countries, which have the nature of simple, lower running cost, and non-chemical was...
Nobutake Nakatani, Wakako Masuda, Daisuke Kozaki, Masanobu Mori, Kiyoshi Hasebe, Nobukazu Nakagoshi, Kazuhiko Tanaka
Bunseki Kagaku   58 305-309   Dec 2009
The simultaneous determination of orthophosphate and silicate ions in river water was examined using ion-exclusion chromatography with spectrophotometric detection at 680 nm after derivatization with molybdate and malachite green. In this study, o...
Daisuke Kozaki, Ryozo Goto, Nobutake Nakatani, Nobukazu Nakagoshi, Wenzhi Hu, Masanobu Mori, Kazuhiko Tanaka
Bunseki Kagaku   58 887-894   Dec 2009
Both H+ and alkalinity are important key parameters for evaluating environmental water quality. In this study, unified cation-exchange chromatography with conductimetric detection on an ODS-silica column (TSKgel ODS-100Z) modified with lithium dod...
Nobutake Nakatani, Wakako Masuda, Daisuke Kozaki, Ryozo Goto, Nobukazu Nakagoshi, Masanobu Mori, Kiyoshi Hasebe, Kazuhiko Tanaka
Analytical Sciences   25 379-383   Jan 2009
Ion-exclusion chromatography was examined for the simultaneous spectrophotometric determinations of orthophosphate and silicate ions in river water using an ascorbate solution as both an eluent and a reducing agent, followed by postcolumn derivati...
Daisuke Kozaki, Ryozo Goto, Wakako Masuda, Daisuke Saito, Nobutake Nakatani, Nobukazu Nakagoshi, Masanobu Mori, Kazuhiko Tanaka
Bunseki Kagaku   57 651-658   Nov 2008
A non-suppressed ion-exclusion/cation-exchange chromatography with conductimetric detection for the simultaneous determination of anions (SO 42- , Cl - , NO 3- , I - , F - , HCOO - and CH 3 COO - ) and cations (Na + , K + , NH 4+ , Mg 2+ and Ca 2+...
Nobutake Nakatani, Daisuke Kozaki, Wakako Masuda, Nobukazu Nakagoshi, Kiyoshi Hasebe, Masanobu Mori, Kazuhiko Tanaka
Analytica Chimica Acta   619 110-114   Jun 2008
The simultaneous spectrophotometric determination of phosphate and silicate ions in river water was examined by using ion-exclusion chromatography and post-column derivatization. Phosphate and silicate ions were separated by the ion-exclusion colu...