Kyushu University Academic Staff Educational and Research Activities Database
List of Papers
Tomoko Imasaka Last modified date:2020.02.05

Lecturer / Department of Environmental Design / Faculty of Design


Papers
1. Ju Tiantian, K. Yoshinaga, T. Imasaka, H. Nakamura, T. Imasaka, Time-correlated Single Ion Counting Mass Spectrometer with Long and Short Time-of-flight Tubes and an Evaluation of its Performance for Use in Trace Analysis of Allergenic Substances, Analytical Sciences (Special Issue), accepted, 10.2116/analsci.19SBP03, An analyte molecule was ionized using a femtosecond laser as the ionization source and was measured by a twin-type time-of-flight mass spectrometer with long (42 cm) and short (6.4 cm) flight tubes. The signal was measured using an analog signal digitizer and a time-correlated single ion counting system, and performance was evaluated by comparing data obtained from both instruments. The short mass spectrometer had a mass resolution of 450 and was used in the trace analysis of allergenic substances in a fragrance..
2. Siddihalu Lakshitha Madunil, Totaro Imasaka, Tomoko Imasaka, Resonant and non-resonant femtosecond ionization mass spectrometry of organochlorine pesticides, Analyst, 10.1039/C9AN01861A, 145, 777-783, 2019.11, Analystの表紙に掲載.
3. V. V. Son, H. Nakamura, T. Imasaka, T. Imasaka, Determination of Nerve Agent Metabolites in Human Urine by Femtosecond Laser Ionization Mass Spectrometry Using 2-(Bromomethyl)naphthalene as a Derivatizing Reagent, interim Decision, Analytica Chimica Acta, https://doi.org/10.1016/j.aca.2019.04.012, 1069, 82-88, 2019.04.
4. Xixiang Yang, Tomoko Imasaka, Totaro Imasaka, Determination of pesticides by gas chromatography combined with mass spectrometry using femtosecond lasers emitting at 267, 400, and 800 nm as the ionization source, Analytical Chemistry, 10.1021/acs.analchem.8b00537, 90, 4886-4893, 2018.03.
5. Adan Li, Tomoko Imasaka, Totaro Imasaka, Optimal Laser Wavelength for Femtosecond Ionization of Polycyclic Aromatic Hydrocarbons and their Nitrated Compounds in Mass Spectrometry, Analytical Chemistry, DOI: 10.1021/acs.analchem.8b00125, 90, 2963-2969, 2018.01.
6. T. Fujii, T. Imasaka, T. Imasaka, Use of chemical conversion for determination of nitrated aromatic hydrocarbons using femtosecond ionization mass spectrometry, Analytica Chimica Acta, DOI: 10.1016/j.aca.2017.09.049, DOI: 10.1016/j.aca.2017.09.049, 996, 48-53, 2017.10.
7. A. Li, D.P.Dinh, T. Imasaka, T. Imasaka, Suppression of Fragmentation in Multiphoton Ionization Mass Spectrometry Using a Near-infrared Femtosecond Laser as an Ionization Source, Analyst, DOI: 10.1039/c7an01172e, 142, 3942-3947, 2017.09.
8. Akifumi Hamachi, Tomoko Imasaka, Hiroshi Nakamura, Totaro Imasaka, Adan Li, Determination of Nerve Agent Metabolites by Ultraviolet Femtosecond Laser Ionization Mass Spectrometry, Analytical Chemistry, DOI:10.1021/acs.analchem.7b00386, 89, 9, 5030-5035, 2017.04.
9. Shimpei Shibuta, Tomoko Imasaka, Totaro Imasaka, Determination of Fragrance Allergens by Ultraviolet Femtosecond Laser Ionization Mass Spectrometry, Analytical Chemistry, DOI:10.1021/acs.analchem.6b03229, DOI:10.1021/acs.analchem.6b03229, 88, 10693-10700, 2016.10.
10. Yang Xixiang, Tomoko Imasaka, Li Adan, Totaro Imasaka, Determination of hexachlorocyclohexane by gas chromatography/multiphoton onization/time-of-flight mass spectrometr, Journal of The American Society for Mass Spectrometry, DOI: 10.1007/s13361-016-1497-7, 27, 1999-2005, 2016.09.
11. Yuanyuan Tang, Tomoko Imasaka, Shigekazu Yamamoto, Totaro Imasaka, Determination of Polycyclic Aromatic Hydrocarbons and Their Nitro-, Amino- Derivatives Absorbed on Particulate Matter 2.5 by Multiphoton Ionization Mass Spectrometry Using Far-, Deep-, and Near-Ultraviolet Femtosecond Lasers, Chemosphere, DOI:10.1016/j.chemosphere.2016.02.114, 152, 252-258, 2016.06.
12. Tomoko Imasaka, Akifumi Hamachi, Tomoya Okuno, Totaro Imasaka, A Simple Method for Evaluation of Pulse Width of an Ultraviolet Femtosecond Laser Used in Two-Photon Ionization Mass Spectrometry, Applied Sciences, DOI:10.3390/app6050136, 6, 5, 136, 2016.05.
13. V.T.T. Duong, V. Duong, N.T.H. Lien, T. Imasaka, Y. Tang, S. Shibuta, A. Hamachi, D. Q. Hoa, T. Imasaka, Detection of polychlorinated biphenyls in transformer oils in Vietnam by multiphoton ionization mass spectrometry using a far-ultraviolet femtosecond laser as an ionization source, Talanta, DOI:10.1016/j.talanta.2015.11.054, 149, 275-279, 2016.03.
14. Noboru Itouyama, Taiki Matsui, Shigekazu Yamamoto, Tomoko Imasaka, Totaro Imasaka, Analysis of Parent/Nitrated Polycyclic Aromatic Hydrocarbons in Particulate Matter 2.5 Based on Femtosecond Ionization Mass Spectrometry, Journal of The American Society for Mass Spectrometry, DOI:10.1007/s13361-015-1276-x, 27, 293-300, 2016.02.
15. Tang Yuanyuan, Tomoko Imasaka, Shigekazu Yamamoto, Totaro Imasaka, Multiphoton Ionization Mass Spectrometry of Nitrated Polycyclic Aromatic Hydrocarbons, Talanta, DOI:10.1016/j.talanta.2015.03.027, 140, 109-114, 2015.08.
16. Yoshinari Takao, Tomoko Imasaka, Yuichiro Kida, Totaro Imasaka, Autocorrelation and Frequency-Resolved Optical Gating Measurements Based on the Third Harmonic Generation in a Gaseous Medium, Applied Sciences, 10.3390/app5020136, 5, 136-144, 2015.06.
17. Tomoko Imasaka, Akifumi Hamachi, Tomoya Okuno, Totaro Imasaka, A simple method for the measurement of the optical pulse width on-site the mass spectrometer, 2015 Conference on Lasers and Electro-Optics (CLEO), JTu5A.7, 2015.05.
18. Akifumi Hamachi, Tomoya Okuno, Tomoko Imasaka, Yuichiro Kida, Totaro Imasaka, Resonant and nonresonant multiphoton ionization processes in mass spectrometry of explosives, Analytical Chemistry, ac-2014-04667t.R1, 87, 3027-3031, 2015.03.
19. Tomoko Imasaka, Totaro Imasaka, An Evaluation of the Spectral Properties of Nerve Agents for Laser Ionization Mass Spectrometry, Analytical Sciences, 10.2116/analsci.30.1113, 30, 12, 1113-1120, 2014.12.
20. Ryota Ezoe, Tomoko Imasaka, Totaro Imasaka, Determination of Triacetone Triperoxide Using Ultraviolet Femtosecond Multiphoton Ionization Time-of-Flight Mass Spectrometry, Analytica Chimica Acta, 10.1016/j.aca.2014.10.045, 853, 508-513, 2014.11.
21. Tomoya Okuno, Tomoko Imasaka, Yuichiro Kida, Totaro Imasaka, Autocorrelator for measuring an ultrashort optical pulse width in the ultraviolet region based on two-photon ionization of an organic compound , Optics Communications, 10.1016/j.optcom.2013.07.055, 310, 48-52, 2014.01.
22. Tomoko Imasaka, Tomoya Okuno, Totaro Imasaka, The Search for a molecule to measure an autocorrelation trace of the second/third harmonic emission of a Ti:sapphire laser based on two-photon resonant excitation and subsequent one photon ionization, Applied Physics B:Lasers and Optics, 10.1007/s00340-013-5505-3, 113, 4, 543-549, 2013.05.
23. Tomoko Imasaka and Totaro Imasaka, Searching for a molecule with a wide frequency domain for non-resonant two-photon ionization to measure the ultrashort optical pulse width, Opt. Commun., 10.1016/j.optcom.2012.04.015, 285, 3514-3518, 2012.06.
24. Tomoko Imasaka and Totaro Imasaka, Molecules with a One Octave Frequency Domain for the Measurement of the 1-fs Optical Pulse Width, Conference on Lasers and Electro-Optics (CLEO), JTh2A.15, 2012.05.
25. Osamu Shitamichi, Tomoko Imasaka, Tomohiro Uchimura, Totaro Imasaka, Multiphoton Ionization/Mass Spectrometry of Polybrominated Diphenyl Ethers, Analytical Methods, 3, 2322-2327, 2011.10.
26. Li Adan, Tomoko Imasaka, Tomohiro Uchimura, Totaro Imasaka, Analysis of Pesticides by Gas Chromatography / Multiphoton Ionization / Mass Spectrometry Using a Femtosecond Laser, Analytica Chimica Acta, 701, 52-59, 2011.07.
27. Yuka Watanabe-Ezoe, Xing Li, Tomoko Imasaka, Tomohiro Uchimura, Totaro Imasaka, Gas Chromatography/Femtosecond Multiphoton Ionization/Time-of-Flight Mass Spectrometry of Dioxins, Analytical Chemistry, 82, 6519-6525, 2010.07.
28. Takashi Shimizu, Yuka Watanabe-Ezoe, Satoshi Yamaguchi, Hiroko Tsukatani, Tomoko Imasaka, Shin-ichi Zaitsu, Tomohiro Uchimura, and Totaro Imasaka, Enhancement of Molecular Ions in Mass Spectrometry Using an Ultrashort Optical Pulse in Multiphoton Ionization, Analytical Chemistry, 10.1021/ac1003773, 82, 3441-3444, 82, 3441-3444, 2010.04.
29. Shoji Hirokawa, Tomoko Imasaka, Totaro Imasaka, The S-1 ← S-0 0-0 transition energies of polychlorinated dibenzofurans (PCDFs) revisited: CIS(D) and MP2 calculations with correction for correlation energies, Journal of Molecular Structure -Theochem, 10.1016/j.theochem.2009.08.021 , 915, 1-3, 79-85, Volume: 915 Issue: 1-3 Pages: 79-85 , 2009.12.
30. Satoshi Yamaguchi, Tomohiro Uchimura, Tomoko Imasaka, Totaro Imasaka, Gas chromatography/time-of-flight mass spectrometry of triacetone triperoxide based on femtosecond laser ionization, Rapid Communications in Mass Spectrometry , 10.1002/rcm.4225 , 23, 19, 3101-3106, Volume: 23 Issue: 19 Pages: 3101-3106 , 2009.10.
31. Hiroko Tsukatani, Hiroki Okudaira, Tomohiro Uchimura, Tomoko Imasaka,Totaro Imasaka, Selective Ionization of 2,4-Xylenol in Mass Spectrometry Using a Tunable Laser and Supersonic Jet Technique, Analytical Sciences, 10.2116/analsci.25.599, 25, 5, 599-604, Volume: 25 Issue: 5 Pages: 599-604, 2009.05.
32. Tomoko Imasaka, Nami Nakamura, Yuji Sakoda, Satoshi Yamaguchi, Yuka Watanabe-Ezoe, Tomohiro Uchimura, Totaro Imasaka, Data processing technique in gas chromatography/time-of-flight mass spectrometry, Analyst (Royal Soc Chemistry), 10.1039/b815630a , 134, 4, 712-718, Volume: 134 Issue: 4 Pages: 712-718, 2009.02.
33. Satoshi Yamaguchi, Fumiaki Kira, Yuki Miyoshi, Tomohiro Uchimura, Yuka Watanabe-Ezoe, Shin-ichi Zaitsu , Tomoko Imasaka, Totaro Imasaka, Near-ultraviolet femtosecond laser ionization of dioxins in gas chromatography/time-of-flight mass spectrometry, Analytica Chimica Acta , 10.1016/j.aca.2008.11.005 , 63, 12, 229-233, Volume: 632 Issue: 2 Pages: 229-233 , 2009.01.
34. Yuka Watanabe-Ezoe, Nami Nakamura, Tomohiro Uchimura, Satoshi Yamaguchi, Tomoko Imasaka, Totaro Imasaka, Gas Chromatography/Multiphoton Ionization/Mass Spectrometry of Pentachlorodibenzofurans in Soils, Organohalogen Compounds, 70, 2396-2399 , Vol. 70, pp.2396-2399, 2008.12.
35. Tomoko Imasaka, Shoji Hirokawa, Totaro Imasaka, Ab initio MO study on the S-1 ← S-0 origin transition energies of polychlorodibenzofurans (PCDFs), Journal of Molecular Structure-Theochem, 10.1016/j.theoshem.2006.07.005 , 774, 1-3, 7-12, Volume: 774 Issue: 1-3 Pages: 7-12, 2006.11.
36. Shoji Hirokawa, Tomoko Imasaka, Yoshikazu Oyakawa, Masataka Oishi, Totaro Imasaka, Conformational changes and S-1 ← S-0 origin transition energies: Polychlorinated biphenyls (PCBs), Journal of Molecular Structure-Theochem, 10.1016/j.theochem.2006.06.009 , 772, 1-3, 31-37, Volume: 772 Issue: 1-3 Pages: 31-37 , 2006.10.
37. Shoji Hirokawa, Tomoko Imasaka, Totaro Imasaka, Chlorine substitution pattern, molecular electronic properties, and the nature of the ligand-receptor interaction: Quantitative property-activity relationships of polychlorinated dibenzofurans, Chemical Research in Toxicology (American Chemical Society), 10.1021/tx049874f, 18, 2, 232-238, Volume: 18 Issue: 2 Pages: 232-238 , 2005.02.
38. Tomoko Imasaka, Shoji Hirokawa , Additivity of electron correlation energy and the ab initio MO calculation of (0-0) S-1 ← S-0 transition energies: polychlorinated dibenzofurans, Journal of Molecular Structure-Theochem, 10.1016/j.theochem.2004.08.003 , 710, 1-3, 19-23, Volume: 710 Issue: 1-3 Pages: 19-23, 2004.11.
39. Shoji Hirokawa,Tomoko Imasaka,Yoshihiro Urakami, Ab initio MO study on the S-1 ← S-0 transitions of polychlorinated dibenzo-p-dioxins, Journal of Molecular Structure-Theochem, 10.1016/S0166-1280(02)00648-6 , 3, 229-237, Volume: 622 Issue: 3 Pages: 229-237, 2003.03.
40. Tomoko Imasaka, Shoji Hirokawa, Mean-field theory of the orientational ordering of dipolar guest molecules in beta-hydroquinone clathrate of SO2 and D2S, Journal of the Physical Society of Japan , 10.1143/jpsj.70.2603, 70, 9, 2603-2612, Volume: 70 Issue: 9 Pages: 2603-2612 , 2001.09.
41. Tomoko Imasaka, Shoji Hirokawa, Effects of a crystal field on the orientational phase transition in a system of dipoles: A mean-field study of SO2-beta-hydroquinone clathrate, Journal of the Physical Society of Japan , 10.1143/jpsj.66.1364, 66, 5, 1364-1370, Volume: 66 Issue: 5 Pages: 1364-1370 , 1997.05.
42. Shoji Hirokawa, Tomoko Imasaka,Takasuke Matsuo, Quantum Effects on the Orientational Ordering of H2S and D2S Molecules Enclosed in Beta-Quinol Clathrate, Journal of the Physical Society of Japan, 63, 2, 593-601, Volume: 63 Issue: 2 Pages: 593-601 , 1994.02.
43. Shoji Hirokawa, Tomoko Imasaka, Effect of a Cryatal-Field on the Orientational of H2S Molecules Enclosed in Beta-Quinol Clathrate, Journal of the Physical Society of Japan , 59, 10, 3797-3798, Volume: 59 Issue: 10 Pages: 3797-3798 , 1990.10.
44. Shoji Hirokawa, Tomoko Iwasaki (Imasaka), Orientational Order of Guest H2S Molecules in β-Quinol Clathrate, Journal of the Physical Society of Japan, 10.1143/jpsj.63.593, 57, 11, 3843-3850, Volume: 57 Issue: 11 Pages: 3843-3850 , 1988.11.