Continuous measurements of stable carbon isotopes in CO2 with a near-IR laser absorption spectrometer
作者： Kotaro Tanaka , Ryota Kojima , Kenshi Takahashi , Kenichi Tonokura
DOI: 10.1016/J.INFRARED.2013.05.011
关键词: Isotope-ratio mass spectrometry 、 Nuclear magnetic resonance 、 Humidity 、 Laser 、 Analytical chemistry 、 Absorption (electromagnetic radiation) 、 Isotope 、 Isotopes of carbon 、 Absorption spectroscopy 、 Spectrometer 、 Materials science
摘要: Abstract A near-IR laser absorption spectrometer using a technique of wavelength modulation spectroscopy is used to measure stable carbon isotope ratios ambient CO2 (δ13C) via the lines 12CO2 R(17) (2ν1 + ν12 − ν12 + ν3) at 4978.205 cm−1 and 13CO2 P(16) (ν1 + 2ν2 + ν3) 4978.023 cm−1. The are measured with reproducibility 0.02‰ (1σ) in 130-s integration time over 12-h period. humidity effect on δ13C values has been evaluated laboratory experiments. air were continuously 8 days agreed well those from ratio mass spectrometry canister samples. thus capable real-time, situ measurements under conditions.
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