How can you identify CaO from FTIR?

Quick answer

CaO 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

Spectrum logic

The logic here is evidence aggregation: repeated literature mentions of CaO, 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 4.8

  CaO

  Habte 等 - 2019 - Synthesis of Nano-Calcium Oxide from Waste Eggshel DOI: 10.3390/su11113196
• confidence 4.8

  CaO

  Synthesis of tetracalcium phosphate from mechanochemically activated reactants and assessment as a component of bone cements DOI: 10.1007/s10856-008-3403-8
• confidence 3.6

  CaO

  Syukri 等 - 2020 - Natural Clay of Pasaman Barat Enriched by CaO of C DOI: 10.9767/bcrec.15.3.8097.662-673)
• confidence 3.6

  CaO

  Effects of CaO/SiO<sub>2</sub> on Viscous Behaviors and Structure of CaO-SiO<sub>2</sub>-11.00wt%MgO-11.00wt%Al<sub>2</sub>O<sub>3</sub>-43.00wt%TiO<sub>2</sub> Slag Systems DOI: 10.2355/isijinternational.ISIJINT-2018-444
• confidence 3.6

  CaO

  STRUCTURE, GLASS STABILITY AND RHEOLOGICAL PROPERTIES OF Na₂O-CaO-Al₂O₃-SiO₂ GLASSES DOPED WITH Y₂O₃ DOI: 10.13168/cs.2018.0009
• confidence 3.6

  CaO

  Optimization and characterization of biodiesel from waste cooking oil using modified CaO catalyst derived from snail shell DOI: 10.1016/j.heliyon.2023.e16475
• confidence 3.6

  CaO

  Dual functional catalytic materials of Ni over Ce-modified CaO sorbents for integrated CO2 capture and conversion DOI: 10.1016/j.apcatb.2018.11.040
• confidence 2.8

  CaO

  Effect of NaF and CaO/SiO2 on the Hydrogen Dissolution in the CaO^|^ndash;SiO2^|^ndash;FeOt Based Flux System DOI: 10.2355/isijinternational.53.27
• confidence 2.8

  CaO

  Direct Polypropylene and Polyethylene Liquefaction in CO2 and N2 Atmospheres Using MgO Light and CaO as Catalysts DOI: 10.3390/ma15030844
• confidence 2.8

  CaO

  Viscous Behavior of Alumina Rich Calcium-Silicate Based Mold Fluxes and Its Correlation to the Melt Structure DOI: 10.2355/isijinternational.53.170