How can you identify gypsum from FTIR?
This page summarizes the recurring FTIR evidence reported for gypsum, 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 13 cited sources
Quick answer
gypsum 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
| Functional group | Evidence |
|---|---|
| Hydroxyl (O-H) | 13 |
| Alkyl C-H | 9 |
| Methacrylate | 8 |
| Acetate | 8 |
| Amide | 8 |
| Methoxy (OCH3) | 7 |
| C-O single bond | 7 |
| Silicon-oxygen (Si-O) | 4 |
Spectrum logic
The logic here is evidence aggregation: repeated literature mentions of gypsum, 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
-
confidence 0.9
gypsum
ATR-FTIR spectroscopic characterization of ferric arsenic-containing colloid and gypsum DOI: 10.5004/dwt.2019.23721 -
confidence 0.9
gypsum
Organic Matter and Pigments in the Wall Paintings of Me-Taw-Ya Temple in Bagan Valley, Myanmar DOI: 10.3390/app112311441 -
confidence 0.9
gypsum
Capobianco 等 - 2017 - Chemometrics approach to FT-IR hyperspectral imagi DOI: 10.1016/j.clay.2010.10.021. -
confidence 0.9
gypsum
Mineralization and Preservation of an extremotolerant Bacterium Isolated from an Early Mars Analog Environment DOI: 10.1038/s41598-017-08929-4 -
confidence 0.9
gypsum
Aiding the cleaning of four 19th-century Tsimshian house posts: investigation of museum-applied surface coatings and original polychromy DOI: 10.1186/s40494-021-00513-4 -
confidence 0.8
gypsum
Multi-technique analysis of pigments on sandstone sculptures: Renaissance re-painting of a Roman relief DOI: 10.1186/s40494-022-00790-7 -
confidence 0.8
gypsum
Damjanovic 等 - 2015 - Spectroscopic investigation of two Serbian icons p DOI: 10.2298/JSC140722099D -
confidence 0.8
gypsum
Melelli 等 - 2021 - Chemical, morphological and mechanical study of th DOI: 10.1016/0305-4403(75)90059-X. -
confidence 0.7
gypsum
Evaluation of Gypsum and Calcium Oxalates in Deteriorated Mural Paintings by Quantitative FTIR Spectroscopy DOI: 10.1081/SL-120026615 -
confidence 0.6
gypsum
Synthesis of nano-crystallite gypsum and bassanite from waste <i>Pila globosa</i> shells: crystallographic characterization DOI: 10.1039/d2ra04881g
See gypsum in your own spectrum
Upload your FTIR spectrum and get AI-assisted polymer analysis and peak-by-peak interpretation from your own spectrum.