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  1. No Access

    Article

    Comparison of continuous flow analysis and ion chromatography for determinations of nitrate, nitrite and phosphate ions in seawater and development of related seawater certified reference materials

    Determinations of three nutrients (nitrate, nitrite and phosphate ions) in seawater were investigated by continuous flow analysis (CFA) based on colorimetry and ion chromatography (IC). The accuracies of those...

    Chikako Cheong, Toshihiro Suzuki, Tsutomu Miura… in Accreditation and Quality Assurance (2024)

  2. No Access

    Article

    Simultaneous Determination of Five Bile Acids as Potential Biomarkers for Alzheimer’s Disease in Mouse Brain and Plasma

    In this study, we developed an analytical method using LC-MS/MS for the simultaneous determination of five bile acids (BAs) that have been recently reported as candidate diagnostic biomarkers for Alzheimer's d...

    Shin Koike, Yusuke Miyaji, Hinako Sano, Natsuki Aikawa, Masayuki Kai… in Analytical Sciences (2021)

  3. No Access

    Article

    New Japanese certified reference materials for electrolytic conductivity measurements

    The National Metrology Institute of Japan (NMIJ) has established three certified reference materials (CRMs) in electrolytic conductivity with a primary Jones-type cell: aqueous solutions of potassium chloride ...

    Toshiaki Asakai, Igor Maksimov, Sachiko Onuma… in Accreditation and Quality Assurance (2017)

  4. No Access

    Article

    Highly robust protein production by co-culture of CHO spheroids layered on feeder cells in serum-free medium

    Recombinant Chinese hamster ovary (rCHO) cells have been the most commonly used mammalian host for large-scale commercial production of therapeutic proteins. Although recent advances in 3D culture of rCHO cell...

    Koichi Kutsuzawa, Toshihiro Suzuki, Hidehiro Kishimoto… in Colloid and Polymer Science (2014)

  5. No Access

    Article

    Temporal stability of standard potentials of silver–silver chloride reference electrodes

    The four-year evolution of standard potential of a silver–silver chloride reference electrode (denoted further in the text as an Ag/AgCl electrode) is presented together with some suggestions for the improveme...

    Igor Maksimov, Masaki Ohata, Toshiaki Asakai… in Accreditation and Quality Assurance (2012)

  6. No Access

    Article

    Influence of Speciation on the Response from Selenium to UV-Photochemical Vapor Generation

    By exposure to appropriate UV intensities, rapid and quantitative oxidation/reduction of inorganic selenite, selenate and several organoselenium compounds representative of those of biochemical/metabolic inter...

    Toshihiro Suzuki, Ralph E. Sturgeon, Chengbin Zheng, Akiharu Hioki… in Analytical Sciences (2012)

  7. No Access

    Article

    Preparation and certification of arsenate [As(V)] reference material, NMIJ CRM 7912-a

    Arsenate [As(V)] solution reference material, National Metrology Institute of Japan (NMIJ) certified reference material (CRM) 7912-a, for speciation of arsenic species was developed and certified by NMIJ, the ...

    Tomohiro Narukawa, Takayoshi Kuroiwa… in Analytical and Bioanalytical Chemistry (2010)

  8. No Access

    Article

    Preparation and properties of fluoroalkyl end-capped vinyltrimethoxysilane oligomeric nanoparticles—A new approach to facile creation of a completely superhydrophobic coating surface with these nanoparticles

    Novel fluoroalkyl end-capped vinyltrimethoxysilane oligomeric nanoparticles were prepared by the hydrolysis of the corresponding oligomer under alkaline conditions. The size of fluorinated nanoparticles thus o...

    Hideo Sawada, Toshihiro Suzuki, Hiroki Takashima… in Colloid and Polymer Science (2008)

  9. Article

    Erratum to: Precise Chelatometric Titrations of Zinc, Cadmium, and Lead with Molecular Spectroscopy

    Toshihiro Suzuki, Diwakar Tiwari, Akiharu Hioki in Analytical Sciences (2008)

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  10. No Access

    Article

    Precise Chelatometric Titrations of Zinc, Cadmium, and Lead with Molecular Spectroscopy

    Spectral data during a chelatometric titration were utilized for determining an equivalence point of the titration. Three-dimensional titration data were analyzed by fitting to a theoretical equation that was ...

    Toshihiro Suzuki, Diwakar Tiwari, Akiharu Hioki in Analytical Sciences (2007)

  11. No Access

    Article

    Fractional Elution and Determination of Uranium and Vanadium Adsorbed on Amidoxime Fiber from Seawater

    Toshihiro Suzuki, Kyoichi Saito, Takanobu Sugo, Hisako Ogura… in Analytical Sciences (2000)