How can you identify protein from FTIR?
This page summarizes the recurring FTIR evidence reported for protein, 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 42 cited sources
Quick answer
protein 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
| Funktionell grupp | Bevis |
|---|---|
| Amide | 103 |
| Carbonyl (C=O) | 18 |
| N h | 14 |
| Methacrylate | 14 |
| Acetate | 14 |
| Carboxyl (COOH) | 13 |
| Alkyl C-H | 13 |
| Secondary amine | 11 |
Spectrum logic
The logic here is evidence aggregation: repeated literature mentions of protein, 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
-
förtroende 1,0
protein
Fourier transform infrared spectroscopy coupled with machine learning classification for identification of oxidative damage in freeze-dried heart valves DOI: 10.1038/s41598-021-91802-2 -
förtroende 0,9
protein
van Thor 等 - 2005 - Assignments of the Pfr-Pr FTIR difference spectrum DOI: 10.1021/jp052323t -
förtroende 0,9
protein
Bergo 等 - 2009 - Active Water in Protein-Protein Communication with DOI: 10.1021/bi802180a. -
förtroende 0,9
protein
Malferrari 等 - 2012 - A New Method for D2OH2O Exchange in Infrared Spec DOI: 10.1155/2012/791342 -
förtroende 0,9
protein
In‐line monitoring of protein concentration with MIR spectroscopy during UFDF DOI: 10.1002/elsc.202200050 -
förtroende 0,9
protein
Sasimowski 等 - 2020 - Analysis of Selected Properties of Biocomposites B DOI: 10.3390/ma13184182 -
förtroende 0,9
protein
Protein Conformation in Amorphous Solids by FTIR and by Hydrogen/Deuterium Exchange with Mass Spectrometry DOI: 10.1529/biophysj.108.139899 -
förtroende 0,9
protein
Usoltsev 等 - 2020 - FTIR Spectroscopy Study of the Secondary Structure DOI: 10.3390/biom10040606 -
förtroende 0,8
protein
Cacao 等 - 2013 - High-Resolution, High-Throughput, Positive-Tone Pa DOI: 10.1371/journal.pone.0056835 -
förtroende 0,8
protein
Onodera 等 - 2007 - Label-free detection of protein-protein interactio DOI: 10.1021/la7022192
Upload your FTIR spectrum
Get AI-based polymer identification and peak-by-peak interpretation from your own spectrum.