Measurement of stable isotopes in carbon monoxide using laser absorption spectroscopy

• Project/Area Number: 26288086
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Partial Multi-year Fund
• Section: 一般
• Research Field: Green/Environmental chemistry
• Research Institution: The University of Tokyo
• Principal Investigator: TONOKURA KENICHI 東京大学, 新領域創成科学研究科, 教授 (00260034)
• Co-Investigator(Kenkyū-buntansha): 田中 光太郎 茨城大学, 工学部, 准教授 (10455470)
• Project Period (FY): 2014-04-01 – 2017-03-31
• Project Status: Completed (Fiscal Year 2016)
• Budget Amount: ¥16,770,000 (Direct Cost: ¥12,900,000、Indirect Cost: ¥3,870,000); Fiscal Year 2016: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000); Fiscal Year 2015: ¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000); Fiscal Year 2014: ¥9,750,000 (Direct Cost: ¥7,500,000、Indirect Cost: ¥2,250,000)
• Keywords: 環境計測 / 一酸化炭素 / 同位体計測 / 環境分析 / 同位体分析

Outline of Final Research Achievements

We developed a mid-infrared laser absorption spectrometer for the detection of stable isotopes of carbon monoxide （CO) and the measurement of ambient carbon monoxide that uses a mid infrared interband cascade laser and a multi-pass cell with wavelength modulation spectroscopy. At 4.57μm wavelength region, stable carbon and oxygen isotopes could be detected. The CO mixing ratios were measured with a high reproducibility.
Measurements of outside air were conducted over 4 days. Usability of the developed laser absorption spectrometer has been proven for the research of atmospheric environment.

Research Products

• [Journal Article] Sensitive measurements of trace gas of formaldehyde using a mid-infrared laser spectrometer with a compact multi-pass cell (2016)
  • Author(s): Kotaro Tanaka, Kai Miyamura, Kazushi Akishima, Kenichi Tonokura, Mitsuru Konno
  • Journal Title: Infrared Physics & Technology Volume: 79 Pages: 1-5
  • DOI: 10.1016/j.infrared.2016.09.004
  • Peer Reviewed / Acknowledgement Compliant
• [Presentation] Real-time measurement of atmospheric carbon monoxide combined with mid-infrared wavelength modulation spectroscopy (2017)
  • Author(s): Chikara Hashimoto and Kenichi Tonokura
  • Organizer: JpGU-AGU Joint Meeting 2017
  • Place of Presentation: 千葉、幕張メッセ
  • Int'l Joint Research