How can you identify NaOH from FTIR?
This page summarizes the recurring FTIR evidence reported for NaOH, 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 10 cited sources
Quick answer
NaOH 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
| Funktionel gruppe | Bevis |
|---|---|
| Alkyl C-H | 14 |
| Silicon-oxygen (Si-O) | 9 |
| C-O single bond | 9 |
| Carbohydrate | 9 |
| Methoxy (OCH3) | 8 |
| Methacrylate | 8 |
| Acetate | 8 |
| Hydroxyl (O-H) | 5 |
Spectrum logic
The logic here is evidence aggregation: repeated literature mentions of NaOH, 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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Siyal 等 - 2014 - Effect of NaOH and Water Contents on Solidificatio DOI: 10.4028/www.scientific.net/AMM.625.3 -
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D'Elia 等 - 2020 - Effect of Alkali Concentration on the Activation o DOI: 10.3390/app10072203 -
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Enhanced Saccharification of Purple Alfalfa via Sequential Pretreatment with Acidified Ethylene Glycol and Urea/NaOH DOI: 10.3390/pr10010061 -
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Physicochemical Characterization of Quinoa (Chenopodium quinoa cv. Nariño) Co-products Obtained by Wet Milling DOI: 10.3389/fsufs.2022.851433 -
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Fabrication of densified wood via synergy of chemical pretreatment, hot-pressing and post mechanical fixation DOI: 10.1186/s10086-020-1853-x -
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Biological Characterization and Instrumental Analytical Comparison of Two Biorefining Pretreatments for Water Hyacinth (Eichhornia crassipes) Biomass Hydrolysis DOI: 10.3390/su13010245 -
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NaOH
Effect of Alkaline Pretreatment on the Fuel Properties of Torrefied Biomass from Rice Husk DOI: 10.3390/en16020679 -
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Sozen - 2022 - Determination of Changes in the Mechanical and Col DOI: 10.15376/biores.17.1.1703-1716 -
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Gunnarsson 等 - 2021 - On the interference of urea with CO2CO32chemist DOI: 10.1016/j.carbpol.2020.117059 -
NaOH
Ethylene Glycol Electrooxidation on Smooth and Nanostructured Pd Electrodes in Alkaline Media DOI: 10.1002/fuce.200900120
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