How can you identify methane from FTIR?
This page summarizes the recurring FTIR evidence reported for methane, including the most frequent peaks, supporting functional groups, and literature-backed interpretation patterns. It is a structured evidence page, not a claim of automatic single-spectrum certainty.
Backed by 15 cited sources
Quick answer
methane is usually reported with a recurring pattern of peaks and functional-group evidence. The most useful approach is to cross-check at least two characteristic peaks before treating it as a match, then verify whether the full spectrum still fits the same material family.
Peak interpretation
Possible materials / groups
| Funkcionālā grupa | Pierādījumi |
|---|---|
| Alkyl C-H | 5 |
| Carboxyl (COOH) | 2 |
| Carbonyl (C=O) | 2 |
| Hydroxyl (O-H) | 2 |
| Carbonate | 1 |
| Methacrylate | 1 |
| Ketone | 1 |
| Ester | 1 |
Spectrum logic
The logic here is evidence aggregation: repeated literature mentions of methane, repeated peak positions, and repeated functional-group associations. A strong material hypothesis should still be supported by multiple peaks that agree with each other, not by one headline band alone.
Real-world usage
This page is designed for polymer identification, incoming-material QC, unknown plastic analysis, recycled-content review, and literature-backed interpretation of reference spectra.
Common mistakes
- Calling a material match too early because one famous peak is present.
- Ignoring sample prep, fillers, oxidation, water, or additives that can change the apparent pattern.
- Using literature evidence without checking whether your own sampling mode and spectrum quality are comparable.
Verification advice
Use DSC, GC-MS, or TGA to validate the material hypothesis when the peak pattern is ambiguous or mixed.
Literature behind this page
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methane
Structural Dependence and Spectroscopic Evidence of Methane Dissolution in Ionic Liquids DOI: 10.1021/acs.jpcb.8b03178 -
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methane
Smith 等 - 2009 - Multispectrum analysis of (CH4)-C-12 in the nu(4) DOI: 10.1016/j.jqsrt.2009.02.015 -
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methane
Berhe 等 - 2020 - Methane and nitrous oxide from ground-based FTIR a DOI: 10.5194/amt-13-4079-2020 -
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methane
Bezanilla 等 - 2014 - Solar absorption infrared spectroscopic measuremen DOI: 10.1016/j.rse.2013.04.024 -
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methane
Jones 等 - 2021 - Assessing urban methane emissions using column-obs DOI: 10.5194/acp-21-13131-2021 -
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methane
Zhang 等 - 2014 - Hydrogen production from CO2 reforming of methane DOI: 10.1016/j.jiec.2013.10.064 -
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methane
Angelbratt 等 - 2011 - A new method to detect long term trends of methane DOI: 10.5194/acp-11-6167-2011 -
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Methane
Christensen 等 - 2018 - The Production of Methane, Acetone, Cold CO and DOI: 10.1021/acs.jpca.7b12297 -
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methane
Frankenberg 等 - 2008 - Pressure broadening in the 2 nu(3) band of methane DOI: 10.1029/2006JD007268 -
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methane
Petersen 等 - 2010 - First ground-based FTIR observations of methane in DOI: 10.5194/acp-10-7231-2010
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