How can you identify HAp from FTIR?
This page summarizes the recurring FTIR evidence reported for HAp, 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
HAp 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
| Funktionelle Gruppe | Beweis |
|---|---|
| Phosphate (PO4) | 25 |
| Hydroxyl (O-H) | 9 |
| Phosphorus | 3 |
| Alkyl C-H | 2 |
| Water (H2O) | 2 |
| Carbonate | 2 |
| N h | 2 |
| Adsorbed carbon monoxide | 1 |
Spectrum logic
The logic here is evidence aggregation: repeated literature mentions of HAp, 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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Vertrauen 4,8
HAp
Effect of calcination temperature on characterization of natural hydroxyapatite prepared from carp fish bones DOI: 10.1007/s42452-019-0396-5 -
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HAp
Temperature effect in physicochemical and bioactive behavior of biogenic hydroxyapatite obtained from porcine bones DOI: 10.1038/s41598-021-89776-2 -
Vertrauen 4,8
HAp
Exploring the Formation Kinetics of Octacalcium Phosphate from Alpha-Tricalcium Phosphate: Synthesis Scale-Up, Determination of Transient Phases, Their Morphology and Biocompatibility DOI: 10.3390/biom13030462 -
Vertrauen 4,8
HAp
Nakata 等 - 2009 - Synthesis and Characterization of Silicon-Doped Hy DOI: 10.2320/matertrans.MC200808 -
Vertrauen 3,6
HAp
Oliveira 等 - 2009 - Comparison of calcium CPP, HAp and TeCP phosphates DOI: 10.4028/www.scientific.net/KEM.396-398.557 -
Vertrauen 0,9
HAP
Choi 等 - 2021 - Fabrication and Characterization of Biodegradable DOI: 10.3390/nano11030617 -
Vertrauen 0,9
HAP
Kamieniak 等 - 2018 - Mechanical, pH and Thermal Stability of Mesoporous DOI: 10.1007/s10904-017-0652-3) -
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HAP
Ghamri 等 - 2023 - Effect of thermal treatment on the structural, mor DOI: 10.15251/DJNB.2023.182.531 -
Vertrauen 0,8
HAP
Seredin 等 - 2020 - Development of a new approach to diagnosis of the DOI: 10.1038/s41598-020-78078-8 -
Vertrauen 0,7
HAP
Ding 等 - 2015 - Enhanced Nanohydroxyapatite Formation Using a Hydr DOI: 10.1155/2015/628405
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