RESULT PAGE
Polystyrene
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FTIR Analysis Report
Moderate confidence
Polystyrene
Sample & Measurement Parameters
Report No.
20260212214838789416377
Date
Spectral Range (cm⁻¹)
N/A
Baseline
AsLS baseline correction
Library match
80%
Identification Result
80%The sample spectrum is identified as polystyrene, with a library search confidence of 84% and a consensus among the top-15 matches. The observed infrared bands are consistent with the characteristic spectral pattern of atactic polystyrene FTIR In-Depth Interpretation was not selected for this task, so this section shows the library-search result only and no deep AI interpretation was run.
Detailed interpretation
- Top library match: Polystyrene #25065
- Minor peaks at 906, 1068, and 1181 cm⁻¹ are not as prominent in idealized polystyrene spectra, but they appear in the library matches and may be attributed to skeletal C-C or C-O vibrations from additives or slight oxidation.
- While the library confidence is high, the presence of a band at 906 cm⁻¹ might suggest a small impurity or additive; however, it does not contradict the primary identification.
- Some direct literature assignments for peaks such as 1068 cm⁻¹ to Si-O or other groups are inconsistent with polystyrene, but these assignments originate from studies on different material systems and are less probable given the strong library match.
Library Comparison
Library spectrum will appear here.
Library Search Results — Top 15 Candidates
| Rank | Match % | Compound | SMILES | Spectrum No. | Action |
|---|---|---|---|---|---|
| Loading library candidates... | |||||
Peak Analysis
★ = Literature-supported assignment| # | Wavenumber (cm⁻¹) | Absorbance | Assignment | Citation | Assignment status | |
|---|---|---|---|---|---|---|
| 1 | · | 699 | 1.00 | - | - | - |
| 2 | · | 1452 | 1.00 | - | - | - |
| 3 | · | 3026 | 1.00 | - | - | - |
| 4 | · | 2923 | 1.00 | - | - | - |
| 5 | · | 1492 | 1.00 | - | - | - |
| 6 | · | 758 | 0.75 | - | - | - |
| 7 | · | 3061 | 0.42 | - | - | - |
| 8 | · | 1601 | 0.36 | - | - | - |
| 9 | · | 3082 | 0.29 | - | - | - |
| 10 | · | 2849 | 0.28 | - | - | - |
| 11 | · | 1028 | 0.24 | - | - | - |
| 12 | · | 3001 | 0.17 | - | - | - |
| 13 | · | 906 | 0.15 | - | - | - |
| 14 | · | 1583 | 0.14 | - | - | - |
| 15 | · | 1068 | 0.13 | - | - | - |
| 16 | · | 1372 | 0.13 | - | - | - |
| 17 | · | 1181 | 0.12 | - | - | - |
| 18 | · | 1154 | 0.11 | - | - | - |
Appendix — Raw Spectrum
Discussion
Comments and follow-up evidence
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