Technology Transfer Network
Emission Measurement Center Spectral Database
Additional Fourier Transform Infrared (FTIR) Spectra
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The following table is a list of spectra recorded by Entropy Inc. at their North Carolina facility under contract with the EPA. The table includes several columns of information for each file. The pathlength is the pathlength of the sample cell used to record that particular spectrum. The TEMP column is the temperature at which the compound was measured. The ASC column is the accepted standard concentration which was assigned by the chemical standard. The ASC values should be used for data analysis. Refer to the report FTIR Technology Development for additional information regarding the preparation of these spectra. Note: The same quality control measures used in the preparation of the EPA Reference Spectra were not necessarily utilized in the acquistion of these spectra. |
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| CAS Reg. No. |
Compound Name | Symbol | Pathlength (m) |
Temp (c) |
Concentration (ppm) (ASC) |
Resolution (cm**-1) |
| 74-82-8 | Methane | CH4 | 2.25 | 100 | 400.5 | 0.25 |
| 74-84-0 | Ethane | C2H5 | 11.25 | 100 | 83.0 | 0.25 |
| 74-85-1 | Ethylene | C2H4 | 2.25 | 100 | 100.0 | 0.25 |
| 74-85-1 | Ethylene | C2H4 | 2.25 | 100 | 100.0 | 0.25 |
| 74-85-1 | Ethylene | C2H4 | 3 | 25 | 100.0 | 0.25 |
| 74-85-1 | Ethylene | C2H4 | 11.25 | 100 | 100.0 | 0.25 |
| 74-85-1 | Ethylene | C2H4 | 11.25 | 100 | 100.0 | 0.25 |
| 74-85-1 | Ethylene | C2H4 | 3 | 25 | 100.0 | 0.25 |
| 74-85-1 | Ethylene | C2H4 | 3 | 25 | 100.0 | 0.25 |
| 74-85-1 | Ethylene | C2H4 | 11.25 | 100 | 100.0 | 0.25 |
| 74-85-1 | Ethylene | C2H4 | 2.25 | 100 | 100.0 | 0.25 |
| 124-38-9 | Carbon Dioxide | CO2 | 3 | 25 | 51.0 | 0.25 |
| 630-08-0 | Carbon Monoxide | CO | 11.25 | 100 | 901.0 | 0.25 |
| 7732-18-5 | Water | H2O | 11.25 | 100 | 0.25 | |
| 7732-18-5 | Water | H2O | 11.25 | 100 | 0.25 | |
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