How can you identify carrageenan from FTIR?
This page summarizes the recurring FTIR evidence reported for carrageenan, 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 14 cited sources
Quick answer
carrageenan 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 |
|---|---|
| Methacrylate | 38 |
| Acetate | 38 |
| Methoxy (OCH3) | 35 |
| C-O single bond | 35 |
| Hydroxyl (O-H) | 27 |
| Alkyl C-H | 25 |
| Amide | 20 |
| Carbonyl (C=O) | 12 |
Spectrum logic
The logic here is evidence aggregation: repeated literature mentions of carrageenan, 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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pārliecība 1,0
carrageenan
Daniel-da-Silva 等 - 2007 - In situ synthesis of magnetite nanoparticles in ca DOI: 10.1021/bm070096q -
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carrageenan
Physicochemical Properties of Biopolymer Hydrogels Treated by Direct Electric Current DOI: 10.3390/polym8070248 -
pārliecība 0,9
carrageenan
The Evaluation of Carrageenan as a Novel and Environmentally Friendly Molybdenite Depressant DOI: 10.3390/min12101234 -
pārliecība 0,8
carrageenan
Chavez-Baldovino 等 - 2023 - Optimizing Sustainable Energy Generation in Ethano DOI: 10.1021/acsomega.3c01188 -
pārliecība 0,8
carrageenan
Organic-Inorganic Novel Green Cation Exchange Membranes for Direct Methanol Fuel Cells DOI: 10.3390/en14154686 -
pārliecība 0,8
carrageenan
Pereira 等 - 2009 - Identification of selected seaweed polysaccharides DOI: 10.1016/j.foodhyd.2008.11.014 -
pārliecība 0,7
carrageenan
Akiyode 和 Boateng - 2018 - Composite Biopolymer-Based Wafer Dressings Loaded DOI: 10.3390/polym10080918 -
pārliecība 0,7
carrageenan
Suryanto 等 - 2019 - Effect of Carrageenan on The Structure of Cassava DOI: 10.1063/1.5115761 -
pārliecība 0,6
carrageenan
Spray-drying microencapsulation of tea extracts using green starch, alginate or carrageenan as carrier materials DOI: 10.1016/j.ijbiomac.2022.01.129 -
pārliecība 0,5
carrageenan
Physicochemical characterization of sodium stearoyl lactylate (SSL), polyoxyethylene sorbitan monolaurate (Tween 20) and κ-carrageenan DOI: 10.1016/j.dib.2018.05.064
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