How can you identify lignin from FTIR?
This page summarizes the recurring FTIR evidence reported for lignin, 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 81 cited sources
Quick answer
lignin 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
| Functionele groep | Bewijs |
|---|---|
| Alkyl C-H | 163 |
| Methacrylate | 111 |
| Acetate | 111 |
| Lignin | 105 |
| C-O single bond | 93 |
| Aromatic ring | 93 |
| Methoxy (OCH3) | 89 |
| Hydroxyl (O-H) | 75 |
Spectrum logic
The logic here is evidence aggregation: repeated literature mentions of lignin, 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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Solihat 等 - 2020 - Microwave assisted dilute organic acid pre-treatme DOI: 10.1088/1757-899X/935/1/012046 -
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Alassod 等 - 2021 - PolypropyleneLigninPOSS Nanocomposites Thermal DOI: 10.3390/ma14143950 -
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Cao 等 - 2021 - Fabrication of Magnetic Lignin-based Adsorbent for DOI: 10.1016/j.apcatb.2017.01.021 -
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Anatomical and chemical analyses on wooden artifacts from a Samnite sanctuary in Hirpinia (Southern Italy) DOI: 10.1016/j.jas.2015.03.002 -
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Steam explosion process for the selective extraction of hemicelluloses polymers from spruce sawdust DOI: 10.1016/j.biortech.2013.10.020 -
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Dinant 等 - 2019 - Synchrotron FTIR and Raman spectroscopy provide un DOI: 10.1093/jxb/ery396 -
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Fornito 等 - 2020 - Degradative Ability of Mushrooms Cultivated on Cor DOI: 10.3390/molecules25133020 -
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Lubis 等 - 2022 - Modification of Ramie Fiber via Impregnation with DOI: 10.3390/polym14112165 -
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Zhang 等 - 2019 - Chemical and Rheological Evaluation of Aged Lignin DOI: 10.3390/ma12244176 -
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Zhu 等 - 2022 - The spatial orientation and interaction of cell wa DOI: 10.21203/rs.3.rs-1076632/v1
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