RESULT PAGE
Predominantly long-chain aliphatic hydrocarbon, consistent with polyethylene
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FTIR Analysis Report
Low confidence
Predominantly long-chain aliphatic hydrocarbon, consistent with polyethylene
Sample & Measurement Parameters
Report No.
20250813133536679690855
Date
Spectral Range (cm⁻¹)
N/A
Baseline
AsLS baseline correction
Library match
36%
Identification Result
36%The sample exhibits a spectral pattern dominated by intense alkyl C–H stretching, scissoring, and rocking modes, indicating a structure composed mainly of long methylene sequences. The overall profile is most consistent with a saturated aliphatic hydrocarbon, such as polyethylene, although the low library similarity precludes definitive identification 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: POLYETHYLENE #48873
- One direct‑evidence citation assigns the 721 cm⁻¹ band to N–H vibration [4]; however, this assignment is inconsistent with the dominating aliphatic hydrocarbon character of the sample and the lack of any accompanying amide/amine features, and therefore is not adopted here.
- The library similarity is low (15%), and no distinct comonomer or crystallinity‑sensitive splitting patterns were resolved, S-O other long‑chain hydrocarbons (e.g., high‑molecular‑weight alkanes, waxes) cannot be excluded.
- The 721 cm⁻¹ band is a generic CH₂ rocking mode that does not uniquely identify polyethylene; complementary analysis is required for confident material classification.
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 assignmentAppendix — Raw Spectrum
Discussion
Comments and follow-up evidence
Use this area to continue the interpretation, ask questions, or add extra verification evidence.
The above shows the FTIR analysis results of a png file uploaded by a user from India. The original image and extracted CSV file are displayed below.
tem.csv
en&2