How can you identify DNA from FTIR?
This page summarizes the recurring FTIR evidence reported for DNA, 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 21 cited sources
Quick answer
DNA 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 | 29 |
| Phosphate (PO4) | 24 |
| Methacrylate | 21 |
| Acetate | 21 |
| Nucleic acid | 17 |
| C-O single bond | 15 |
| Methoxy (OCH3) | 14 |
| Carbonyl (C=O) | 12 |
Spectrum logic
The logic here is evidence aggregation: repeated literature mentions of DNA, 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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DNA
The Application of ATR-FTIR Spectroscopy and the Reversible DNA Conformation as a Sensor to Test the Effectiveness of Platinum(II) Anticancer Drugs DOI: 10.3390/s18124297 -
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DNA
Use of Fourier-Transform Infrared Spectroscopy for DNA Identification on Recycled PET Composite Substrate DOI: 10.3390/app12094371 -
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DNA
Kahn 等 - 2009 - An FTIR Investigation of Flanking Sequence Effects DOI: 10.1021/bi8015235. -
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DNA
DNA-hexadecyltrimethyl ammonium chloride complex with enhanced thermostability as promising electronic and optoelectronic material DOI: 10.1007/s10854-016-5519-9 -
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DNA
Lie 等 - 2004 - Immobilisation and synthesis of DNA on Si(111), na DOI: 10.1039/b302845c -
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DNA
A new approach to studying the effects of ionising radiation on single cells using FTIR synchrotron microspectroscopy DOI: 10.1016/j.radphyschem.2013.03.037 -
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DNA
Micro-Fourier-transform infrared reflectance spectroscopy as tool for probing IgG glycosylation in COVID-19 patients DOI: 10.1038/s41598-022-08156-6 -
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DNA
Bednarek 等 - 2020 - Exploring the Biochemical Origin of DNA Sequence V DOI: 10.3390/ijms21165770 -
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DNA
Marques 等 - 2020 - A New Look into the Mode of Action of Metal-Based DOI: 10.3390/molecules25020246 -
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DNA
Astragalin from Cassia alata Induces DNA Adducts in Vitro and Repairable DNA Damage in the Yeast Saccharomyces cerevisiae DOI: 10.3390/ijms13032846
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