Publications by authors named "Masahiko Numata"

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Development of 3β,4α-dihydroxy-5α-androstan-17-one standard solution for doping analyses.
Miho Kuroe, Taichi Yamazaki, Naoki Saito, Yoshitaka Shimizu, Toshihide Ihara, Masahiko Numata

Drug Test Anal· February 2025

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Reliable purity assay of highly hygroscopic trichloroacetic acid for the development of high-purity reference material of NMIJ CRM 4074-a.
Yoshitaka Shimizu, Taichi Yamazaki, Xinnu Bao, Satoe Nakamura, Toshihide Ihara, Masahiko Numata

Anal Bioanal Chem· May 2023

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Quantification of 23 Volatile Organic Compounds with a Single Reference Material Using Post-column Reaction Gas Chromatography Combined with a Stainless-steel Heating Furnace.
Yuko Kitamaki, Naoki Saito, Nanako Sasaki, Mariko Morita, Tomohiro Sasaki, Masahiko Numata

Anal Sci· August 2021

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Use of Relative Molar Sensitivity as a Specific Value for Evaluating Heptaoxyethylene Dodecyl Ether Concentrations in Methanol Solution.
Miho Kuroe, Masahiko Numata, Naoko Masumoto, Yuzo Nishizaki, Naoki Sugimoto

Anal Sci· June 2021

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Determination of Mogroside V in Luohanguo Extract for Daily Quality Control Operation Using Relative Molar Sensitivity to Single-Reference Caffeine.
Naoko Masumoto, Kyoko Ishizuki, Yuzo Nishizaki, Takashi Ohtsuki, Miho Kuroe, Masahiko Numata

Chem Pharm Bull (Tokyo)· June 2021

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Enhancing the accuracy of measurement of small molecule organic biomarkers.
Tang Lin Teo, Katrice A Lippa, Lindsey Mackay, Sharon Yong, Qinde Liu, Masahiko Numata

Anal Bioanal Chem· November 2019

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Determination of perillaldehyde in perilla herbs using relative molar sensitivity to single-reference diphenyl sulfone.
Naoko Masumoto, Yuzo Nishizaki, Takeshi Maruyama, Yasushi Igarashi, Kaori Nakajima, Masahiko Numata

J Nat Med· June 2019

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Relative molar sensitivities of carnosol and carnosic acid with respect to diphenylamine allow accurate quantification of antioxidants in rosemary extract.
Yuzo Nishizaki, Naoko Masumoto, Kaori Nakajima, Kyoko Ishizuki, Taichi Yamazaki, Masahiko Numata

Food Addit Contam Part A Chem Anal Control Expo Risk Assess· February 2019

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[Determination of Hesperidin and Monoglucosylhesperidin Contents in Processed Foods Using Relative Molar Sensitivity Based on H-Quantitative NMR].
Yuzo Nishizaki, Naoko Sato-Masumoto, Akihito Nakanishi, Yushi Hashizume, Mahamadou Tandia, Masahiko Numata

Shokuhin Eiseigaku Zasshi· July 2018

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Difference between Consensus Value of Participants' Results and Isotope-Dilution Mass Spectrometric Results in Proficiency Testing for Pesticide Residues in Husked Wheat.
Takashi Yarita, Takamitsu Otake, Yoshie Aoyagi, Masahiko Numata, Akiko Takatsu

Anal Sci· June 2018

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Pseudo-Infected Red Blood Cell Beads as Positive Control for Cell Microarray Chip-Based Detection of Plasmodium-Infected RBCs.
Muneaki Hashimoto, Masahiko Numata, Shouki Yatsushiro, Yusuke Ido, Masato Tanaka

J Parasitol· June 2018

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HPLC/PDA determination of carminic acid and 4-aminocarminic acid using relative molar sensitivities with respect to caffeine.
Yuzo Nishizaki, Naoko Sato-Masumoto, Aki Yokota, Tsuyoshi Mikawa, Koichi Nakashima, Masahiko Numata

Food Addit Contam Part A Chem Anal Control Expo Risk Assess· May 2018

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Simultaneous Direct Determinations of Na, Mg, K, Ca, P, and S in Biodiesel Fuel by ICP-QMS/QMS after Xylene Dilution: Development and Application of a High-throughput Method for a Homogeneity Assessment of a Candidate Reference Material.
Yanbei Zhu, Yuko Kitamaki, Masahiko Numata

Anal Sci· December 2017

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Determination of PAHs in Solution with a Single Reference Standard by a Combination of H Quantitative NMR Spectroscopy and Chromatography.
Yuko Kitamaki, Naoki Saito, Taichi Yamazaki, Satoko Otsuka, Satoe Nakamura, Masahiko Numata

Anal Chem· July 2017

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A certified urea reference material (NMIJ CRM 6006-a) as a reliable calibrant for the elemental analyses of amino acids and food samples.
Nobuyasu Itoh, Taichi Yamazaki, Ayako Sato, Masahiko Numata, Akiko Takatsu

Anal Sci· April 2015

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Certification of reference materials for the determination of alkylphenols.
Nobuyasu Hanari, Keiichiro Ishikawa, Yoshitaka Shimizu, Satoko Otsuka, Ryoko Iwasawa, Masahiko Numata

Anal Bioanal Chem· April 2015

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Proficiency testing for determination of pesticide residues in soybean: comparison of assigned values from participants' results and isotope-dilution mass spectrometric determination.
Takashi Yarita, Takamitsu Otake, Yoshie Aoyagi, Takayoshi Kuroiwa, Masahiko Numata

Talanta· January 2015

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Evaluation of the performance of 57 Japanese participating laboratories by two types of z-scores in proficiency test for the quantification of pesticide residues in brown rice.
Takamitsu Otake, Takashi Yarita, Yoshie Aoyagi, Masahiko Numata, Akiko Takatsu

Anal Bioanal Chem· November 2014

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Determination of the carbon, hydrogen and nitrogen contents of alanine and their uncertainties using the certified reference material L-alanine (NMIJ CRM 6011-a).
Nobuyasu Itoh, Ayako Sato, Taichi Yamazaki, Masahiko Numata, Akiko Takatsu

Anal Sci· September 2014

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Development of soybean certified reference material for pesticide residue analysis.
Takashi Yarita, Takamitsu Otake, Yoshie Aoyagi, Youko Kuroda, Masahiko Numata

Talanta· February 2014

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Variation in concentration of perfluorooctanoic acid in methanol solutions during storage.
Nobuyasu Hanari, Nobuyasu Itoh, Keiichiro Ishikawa, Takashi Yarita, Masahiko Numata

Chemosphere· January 2014

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Development of apple certified reference material for quantification of organophosphorus and pyrethroid pesticides.
Takamitsu Otake, Takashi Yarita, Yoshie Aoyagi, Youko Kuroda, Masahiko Numata

Food Chem· June 2013

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Characterization of certified reference material for the quantification of water in bioethanol.
Shinsuke Inagaki, Masahiko Numata, Nobuyasu Hanari, Ryoko Iwasawa, Mayumi Matsuo

Anal Sci· April 2013

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Solid phase extraction using a sulfoxide adsorbent for preconcentration and separation of Hg(II) in natural water followed by ICP-MS measurements.
Yanbei Zhu, Ben Ahmady, Masahiko Numata, Koichi Chiba

Anal Sci· August 2012

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Certified reference material for quantification of polycyclic aromatic hydrocarbons and toxic elements in tunnel dust (NMIJ CRM 7308-a) from the National Metrology Institute of Japan.
Nobuyasu Itoh, Kazumi Inagaki, Tomohiro Narukawa, Yoshie Aoyagi, Izumi Narushima, Masahiko Numata

Anal Bioanal Chem· November 2011

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