Fourier transform near-infrared spectrometer for the determination of carbon, hydrogen, and sulfur in organic compounds by atomic emission from an atmospheric pressure argon inductively coupled plasma
The coupling of Fourier transform spectroscopy to argon inductively coupled plasma (ICP) atomic emissions of nonmetals, e.g., carbon, hydrogen, and sulfur, is investigated in the spectral region 15,800-10,000 cm/sup -1/ (633-1000mm). This type of Fourier transform near-infrared (FT-NIR) investigation is found to be a useful technique for the simultaneous monitoring of ICP excited atomic carbon (CI) emissions around 10,995 and 10,632 cm/sup -1/ (909.5 and 940.5 nm), atomic hydrogen (HI) emission at 15,239 cm/sup -1/ (656.2 nm), and atomic sulfur (SI) emissions around 10,855 cm/sup -1/ (921.2 nm) deriving from organic molecules atomized in the hot ICP. Within the spectral region and reaction conditions used here, the ratio of atomic carbon to atomic hydrogen emission intensity measured simultaneously from an interferometric scan is found to be indicative of chemcial formula stoichiometry yet independent of the total number of hydrocarbon molecules originally injected. The technique appears to be capable of evaluating the chemical formula stoichiometry of unknown organic compounds atomized in the ICP.
- Research Organization:
- Kansas State Univ., Manhattan
- OSTI ID:
- 5077148
- Journal Information:
- J. Phys. Chem.; (United States), Vol. 88:3
- Country of Publication:
- United States
- Language:
- English
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