RESULT PAGE
Glycol/alkanolamine coolant mixture
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FTIR Analysis Report
High confidence
Glycol/alkanolamine coolant mixture
Sample & Measurement Parameters
Report No.
20260528110428364632024
Date
2026-05-28 09:17:39
Spectral Range (cm⁻¹)
[(400, 4000)]
Baseline
AsLS baseline correction
Library match
84%
Identification Result
84%The sample spectrum is consistent with a commercial coolant formulation containing oxygenated organic components such as ethylene glycol and alkanolamines (e.g., triethanolamine). Prominent aliphatic C–H stretching bands, broad O–H/N–H absorption, and C–O stretching features support the presence of polyols and amines. The library search returns Coolant as the nearest match, with the Top-15 candidates dominated by ethanolamines and diols, corroborating this assignment
Detailed interpretation
- Top library match: Coolant #143491
- No distinct carbonyl absorption near 1730 cm⁻¹ is observed; therefore methacrylate or ester structures are unlikely despite the AI-generated direction hint of methoxy/methacrylate.
- A weak band at 2375 cm⁻¹ may arise from atmospheric CO₂ interference rather than a sample component.
- The exact ratio of glycol to alkanolamine cannot be determined from FTIR data alone, and the presence of water or minor additives may influence the spectrum.
- Differentiation between primary, secondary, and tertiary amine contributions is limited by the broad O–H/N–H envelope.
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 | · | 2931 | 1.00 | - | - | - |
| 2 | · | 3190 | 0.98 | - | - | - |
| 3 | · | 2875 | 0.94 | - | - | - |
| 4 | · | 1066 | 0.51 | - | - | - |
| 5 | · | 1035 | 0.49 | - | - | - |
| 6 | · | 2375 | 0.45 | - | - | - |
| 7 | · | 878 | 0.35 | - | - | - |
| 8 | · | 1612 | 0.22 | - | - | - |
| 9 | · | 2109 | 0.21 | - | - | - |
| 10 | · | 1449 | 0.20 | - | - | - |
| 11 | · | 1238 | 0.12 | - | - | - |
| 12 | · | 1911 | 0.10 | - | - | - |
| 13 | · | 1513 | 0.08 | - | - | - |
| 14 | · | 3751 | 0.07 | - | - | - |
| 15 | · | 1991 | 0.06 | - | - | - |
| 16 | · | 3860 | 0.05 | - | - | - |
Appendix — Raw Spectrum
Discussion
Comments and follow-up evidence
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