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Environmental Chemistry Lab
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The lab studies ultrashort pulsed light and mass spectrometry.
AboutAbout the lab
Probing matter with ultrashort-pulse lasers
The lab of Lecturer Tomoko Imasaka studies the generation of ultrashort pulsed light and the development of mass spectrometry using lasers.
Using femtosecond lasers as the ionization light source, the lab has published papers analyzing human breath, red yeast rice products, and biofuels.
The lab also conducts research that uses quantum chemical calculations to theoretically predict the transition energies and ionization potentials of toxic substances such as dioxins and sarin.
Key terms
- Ultrashort pulsed light
- Laser light that is emitted for only a very short time. Femtosecond lasers are one type.
- Mass spectrometry
- An analytical method that turns a substance into ions and separates them by mass to determine its components.
- Quantum chemical calculation
- A method of using computers to calculate and predict the properties of molecules based on the behavior of electrons.
ResearchResearch themes
The lab's research themes are the generation of ultrashort pulsed light, the development of mass spectrometers, and laser ionization mass spectrometry. In addition to mass spectrometry experiments, it also carries out theoretical predictions using quantum chemical calculations.
*Illustrative imageGeneration of ultrashort pulsed light
This research generates ultrashort pulsed light, laser light that is emitted for only a very short time. The lab has reported generating the shortest optical pulses in the near-infrared region and applying them as an ionization light source for mass spectrometry.
*Illustrative imageDevelopment of compact mass spectrometers
The lab develops compact mass spectrometers. It has published a paper on a compact time-of-flight mass spectrometer designed to be used with a compact, high-repetition-rate femtosecond laser ionization source.
*Illustrative imageLaser ionization mass spectrometry
The lab studies mass spectrometry in which samples are ionized by a laser and analyzed. Its work includes online analysis of human breath, analysis of red yeast rice products, and characterization of biofuels using artificial intelligence.
*Illustrative imageTheoretical prediction by quantum chemical calculations
Using the quantum chemistry software Gaussian, the lab theoretically predicts the transition energies and ionization potentials of dioxins, sarin, and similar substances. It has also written a program that calculates an original reliability factor for improving detection limits.
MembersFaculty
- LecturerTomoko Imasaka
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Report an errorAbout the images
The top and research theme images are illustrative and were not taken at the lab. They are cropped from Wikimedia Commons images. Cropped CC BY-SA images are provided under the same CC BY-SA license as the original (version shown on each line).
- Top image: “Mass-Spectrometer-MASPEC---Europa-Clipper” NASA / Public domain (cropped)
- Generation of ultrashort pulsed light: “Ti Sapph YAG supercontinnum” Neath g / CC BY-SA 4.0 (cropped)
- Development of compact mass spectrometers: “Dual linear ion trap” Mkotl / CC BY-SA 3.0 (cropped)
- Laser ionization mass spectrometry: “TOF mass spectrometer June2007” Mwillett4000 / Public domain (cropped)
- Theoretical prediction by quantum chemical calculations: “B2H6 intrinsic bond orbital” Alicesu / CC BY-SA 4.0 (cropped)
- Related lab (Environmental Chemistry Lab): “EPA GULF BREEZE LABORATORY, CHEMISTRY LAB. A PHYSICAL SCIENCE TECHNICIAN IS EXTRACTING PESTICIDES FROM SEDIMENT SAMPLES - NARA - 546275” William C. Shrout / Public domain (cropped)
- Related lab (Architectural and Urban Environmental Engineering Lab): “US Navy 070724-N-6247M-001 Aerographers Mate 3rd Class Daniel Miles and Aerographers Mate 1st Class Jessica Martin take weather observations from the rooftop of the operations building at Naval Air Station Whidbey Island” U.S. Navy photo by Mass Communication Specialist 1st Class Bruce McVicar / Public domain (cropped)
- Related lab (Architectural and Urban Environmental Engineering Lab): “Weather Station USDA” USDA photo by Scott Bauer. Image Number K7688-7 / Public domain (cropped)
- Related lab (Biophysics Lab): “Depth Coded Phalloidin Stained Actin Filaments Cancer Cell” Howard Vindin / CC BY-SA 4.0 (cropped)
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