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
| Funktionel gruppe | Bevis |
|---|---|
| Hydroxyl (O-H) | 14 |
| Silicon-oxygen (Si-O) | 8 |
| Methacrylate | 7 |
| Acetate | 7 |
| Methoxy (OCH3) | 6 |
| C-O single bond | 6 |
| Amide | 5 |
| Carbohydrate | 3 |
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
-
tillid 0,9
gypsum
Salvadori 等 - 2003 - Evaluation of gypsum and calcium oxalates in deter DOI: 10.1081/SL-120026615 -
tillid 0,9
Gypsum
Mineralogical Analysis of Sand Roses and Sand Dunes Samples from Two Regions of South Algeria DOI: 10.1007/s12633-018-9974-1 -
tillid 0,9
gypsum
Chemometrics approach to FT-IR hyperspectral imaging analysis of degradation products in artwork cross-section DOI: 10.1016/j.clay.2010.10.021. -
tillid 0,9
gypsum
Deviese 等 - 2017 - A multi-analytical approach using FTIR, GCMS and DOI: 10.1016/j.microc.2017.03.012 -
tillid 0,8
gypsum
Damjanovic 等 - 2015 - Spectroscopic investigation of two Serbian icons p DOI: 10.2298/JSC140722099D -
tillid 0,8
gypsum
Chemical, morphological and mechanical study of the ageing of textile flax fibers from 17th/18th-century paintings on canvas DOI: 10.1016/0305-4403(75)90059-X. -
tillid 0,8
gypsum
Characterization of the materials and techniques of a birthday inscribed lacquer plaque of the Qing Dynasty DOI: 10.1186/s40494-020-00462-4 -
tillid 0,7
gypsum
Campbell 和 Smith - 2022 - Multi-technique analysis of pigments on sandstone DOI: 10.1186/s40494-022-00790-7 -
tillid 0,7
gypsum
Synthesis of nano-crystallite gypsum and bassanite from waste Pila globosa shells: crystallographic characterization DOI: 10.1039/d2ra04881g -
tillid 0,7
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
Upload your FTIR spectrum
Get AI-based polymer identification and peak-by-peak interpretation from your own spectrum.