A linear time-of-flight mass analyzer for thermal ionization cavity mass spectrometry |
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| Affiliation: | 1. Nuclear Materials and Technology Division, Pit Disassembly and Surveillance Technologies, NMT-15, Los Alamos National Laboratory, Los Alamos, NM 87545, USA;2. Chemistry Division, Analytical Chemistry Sciences, C-ACS, Los Alamos National Laboratory, Los Alamos, NM 87545, USA;3. Nuclear Materials and Technology Division, Actinide Ceramics and Fabrication Group, NMT-9, Los Alamos National Laboratory, Los Alamos, NM 87545, USA;1. Department of Chemistry, Faculty of Science, Silpakorn University, Rajamankha Nai Road, Nakhon Pathom 73000, Thailand;2. Flow Innovation-Research for Science and Technology Laboratories (FIRST Labs.), Thailand;3. Department of Chemistry and Center of Excellence for Innovation in Chemistry, Faculty of Science, Mahidol University, Rama 6 Road, Bangkok 10400, Thailand;4. National Doping Control Centre, Mahidol University, Rama 6 Road, Bangkok 10400 Thailand;5. Department of Chemistry, Faculty of Science, Srinakharinwirot University, Sukhumvit 23 Road, Bangkok 10110, Thailand;6. Bangkok High Lab Co., Ltd., Ladplakao 66, Ladplakao Road, Bangkok 10220, Thailand;1. College of Chemistry, Jilin University, Changchun 130012, China;2. China-Japan Hospital of Jilin University, Changchun 130031, China;1. Department of Applied Chemistry, Tokyo University of Science, Kagurazaka, Shinjuku-ku, Tokyo 162-8601, Japan;2. Research Institute for Science and Technology, Tokyo University of Science, Kagurazaka, Shinjuku-ku, Tokyo 162-8601, Japan |
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| Abstract: | In this paper we report the basic design characteristics, typical operating parameters, and isotope ratio performance of an orthogonal acceleration linear thermal ionization cavity time-of-flight mass spectrometer (TIC-TOFMS). The present system is capable of mass resolution of 750–850 (FWHM) over a wide range of masses, and can generate and analyze multi-element spectra from sub-μg samples (solids and solution residues) in <30–45 min. The optimum precision (1σ) of isotope ratios determined from 60–80 spectra (each the average of 600 individual spectra) is 0.2–0.4% R.S.D., and is limited by the instrument drift, dead time and the data acquisition and processing capabilities of the 8-bit digital oscilloscope used to collect the data. Isotope ratio accuracy (1σ, per mass unit) for major isotopes is typically <±1.0%. |
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