Nakayama, Kenichi. Precise Quantification of Tungsten in Tool Steel Samples by Simultaneous Measurement of Vanadium Internal Standard in Continuum -light-source Flame Atomic Absorption Spectrometry. TETSU TO HAGANE-JOURNAL OF THE IRON AND STEEL INSTITUTE OF JAPAN. 2023. 109. 7. 9-14
Nakayama, Kenichi. Selecting an Acid Mixture for Microwave Digestion of Diverse Steel Samples in Inductively Coupled Plasma Atomic Emission Spectrometric Analysis of Boron, Aluminum, Silicon, Phosphorous, and Alloyed Elements. ISIJ INTERNATIONAL. 2022. 62. 5. 1023-1026
Nakayama, Kenichi. Precise Quantification of Tungsten in Tool Steel Samples by Simultaneous Measurement of Vanadium Internal Standard in Continuum-light-source Flame Atomic Absorption Spectrometry. ISIJ INTERNATIONAL. 2022. 62. 5. 849-853
Nakayama, Kenichi, Wagatsuma, Kazuaki. Multicomponent Internal Standard Methods for Determination of Vanadium, Chromium, Nickel, and Copper in Tool Steel Samples in Continuum-light-source Flame Atomic Absorption Spectrometry. ISIJ INTERNATIONAL. 2021. 61. 7. 2122-2126
Nakayama, Kenichi, Wagatsuma, Kazuaki. Oxidative Quaternary Acidic Mixture on Microwave-assisted Digestion for High-Carbon Iron Samples. ISIJ INTERNATIONAL. 2021. 61. 7. 2181-2184