Akira Kotani, Miyu Sakazume, Koichi Machida, Kazuhiro Yamamoto, Hideki Hakamata. Electrochemical Analysis for Total Alkalinity of Water by the Measurement of Cathodic Prepeak of Quinone Caused by Surplus Acid. Chemical and Pharmaceutical Bulletin. 2024. 72. 3. 266-270
Akira Kotani, Hisanobu Ishikawa, Takashi Shii, Minpei Kuroda, Yoshihiro Mimaki, Koichi Machida, Kazuhiro Yamamoto, Hideki Hakamata. Determination of oxalic acid in herbal medicines by semi-micro hydrophilic interaction liquid chromatography coupled with electrochemical detection. Analytical Sciences. 2023. 39. 4. 441-446
Kazuhiro Yamamoto, Koichi Machida, Akira Kotani, Hideki Hakamata. Gradient elution of hydroxyacetophenones by supercritical fluid chromatography with electrochemical detection. Analytical sciences : the international journal of the Japan Society for Analytical Chemistry. 2022
Akira KOTANI, Jumpei WATANABE, Koichi MACHIDA, Kazuhiro YAMAMOTO, Hideki HAKAMATA. Determination of Amino Acidity in Japanese Sake Based on the Voltammetric Measurement of Surplus Acid by Quinone Reduction. Electrochemistry. 2022. 90. 11. 117002-117002
Koichi Machida, Yuji Koseki, Akira Kotani, Kazuhiro Yamamoto, Tsuyoshi Miura, Hideki Hakamata. Simultaneous determination of deuterium-labeled ergosterol and brassicasterol in stroke-prone spontaneously hypertensive rats by ultra-high performance liquid chromatography-electrospray ionization-tandem mass spectrometry. Analytical Methods. 2022. 14. 46. 4879-4885