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Vzorec FTIR je najbolj skladen s stirenskim aromatskim ogljikovodikovim polimerom, pri čemer je polistiren najbližje ujemanje v knjižnici. To smer podpirajo aromatsko C-H raztezanje pri 3031-3081 cm-1, aromatske obročne vezi pri 1604 in 1493 cm-1, močne izravnalne aromatske C-H vezi pri 701, 751 in 758 cm-1 ter alifatska C-H raztezanja pri 2926 in 2857 cm-1, ki skupaj označujejo fenil substituiran ogljikovodikov polimer. Vendar je zaupanje v knjižnico zelo nizko in noben neposreden referenčni ali literaturni dokaz neodvisno ne potrjuje določitve specifične snovi, zato je najbolj obrambna ugotovitev smer stirenskega aromatskega ogljikovodikovega polimera, ne pa trdna identifikacija snovi.
Priporočeni naslednji koraki: Compare the sample directly against a verified Polystyrene reference spectrum collected under the same ATR or transmission conditions, focusing on the relative intensities and exact positions of the 1604, 1493, 758, and 701 cm-1 bands. Inspect the full spectrum for the typical styrenic fingerprint-region pattern and for any weak heteroatom-associated bands that could indicate additives, oxidation, or copolymerization. If a firmer identification is needed, use complementary methods such as Raman spectroscopy, DSC or TGA, or pyrolysis-GC/MS to distinguish Polystyrene from other styrenic polymers or blends. If the sample is a manufactured article, analyze a cleaned interior cross-section to reduce interference from surface coatings, weathering, or contamination.
| Uvrstitev | Ujemanje % | Spojina | SMILES | Št. spektra | {'index': 16, 'corrected': 'Samo na podlagi ujemanja s knjižnico, razvrščenega po podobnosti.'} |
|---|---|---|---|---|---|
| Nalaganje kandidatov knjižnice... | |||||
| # | Valovno število (cm⁻¹) | {'index': 12, 'corrected': 'Dodeljena skupina'} | Dodelitev | {'index': 33, 'corrected': 'Kontakt'} | {'index': 21, 'corrected': 'ŠTEVILKA CAS'} | |
|---|---|---|---|---|---|---|
| 1 | · | 701 | 1.00 | - | - | - |
| 2 | · | 2926 | 0.92 | - | - | - |
| 3 | · | 1450 | 0.91 | - | - | - |
| 4 | · | 3031 | 0.91 | - | - | - |
| 5 | · | 751 | 0.83 | - | - | - |
| 6 | · | 758 | 0.71 | - | - | - |
| 7 | · | 1493 | 0.41 | - | - | - |
| 8 | · | 3071 | 0.37 | - | - | - |
| 9 | · | 3081 | 0.33 | - | - | - |
| 10 | · | 2857 | 0.31 | - | - | - |
| 11 | · | 1604 | 0.28 | - | - | - |
| 12 | · | 1025 | 0.20 | - | - | - |
| 13 | · | 903 | 0.14 | - | - | - |
| 14 | · | 1070 | 0.13 | - | - | - |
| 15 | · | 1360 | 0.11 | - | - | - |
| 16 | · | 1376 | 0.11 | - | - | - |
Uporabite to področje za nadaljevanje interpretacije, postavljanje vprašanj ali dodajanje dodatnih dokazov za preverjanje.
FTIR.fun
The user from Taiwan (IP: 2407::) uploaded a DOCX file containing three IR spectra. Swipe up to view the qualitative analysis of the first spectrum. The user also expressed intent to calculate sample thickness using interference peaks. Based on the spectra, the analysis was performed at wave numbers 2501 and 2563, yielding an interference peak difference (V₁ - V₂) of 62 cm-1 and ΔN = 1. By inputting the film's refractive index(n), the sample thickness (d) was determined.Here is the original spectrum of the sample extracted from the DOCX file.
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