Lignin — Puncak serapan FTIR dan tugasan
Ini adalah nombor gelombang FTIR ciri di mana Lignin cenderung menyerap, disusun dari literatur yang diterbitkan dan disusun berdasarkan bukti sokongan. Setiap tugasan dapat dikesan ke sumber (DOI) dan disahkan silang terhadap 130,000+ spektrum rujukan dan graf pengetahuan kami.
Backed by 8 cited sources
Jawapan pantas
Lignin biasanya ditetapkan dengan mencari kelompok berulang puncak ciri dan bukan satu nombor tepat buku teks. Jadual di bawah menunjukkan di mana literatur paling kerap meletakkan kumpulan ini dalam FTIR, yang disusun mengikut bukti terkumpul.
Puncak FTIR ciri untuk Lignin
| Nombor gelombang (cm⁻¹) | Fakta sokongan | Sumber dipetik | Keyakinan tertinggi |
|---|---|---|---|
| 1510 | 26 | 22 | 1.0 |
| 1600 | 18 | 15 | 1.0 |
| 1595 | 12 | 11 | 1.0 |
| 1512 | 9 | 9 | 1.0 |
| 1505 | 9 | 8 | 1.0 |
| 1508 | 8 | 8 | 1.0 |
| 1515 | 7 | 7 | 1.0 |
| 1504 | 7 | 6 | 1.0 |
| 1500 | 7 | 6 | 1.0 |
| 1220 | 6 | 6 | 1.0 |
| 1420 | 6 | 6 | 1.0 |
| 1514 | 6 | 6 | 1.0 |
| 1421 | 6 | 5 | 1.0 |
| 1506 | 5 | 5 | 1.0 |
| 1605 | 5 | 5 | 1.0 |
| 1732 | 5 | 5 | 1.0 |
| 1509 | 5 | 5 | 1.0 |
| 1507 | 5 | 5 | 1.0 |
| 1425 | 5 | 4 | 1.0 |
| 830 | 5 | 4 | 1.0 |
| 1737 | 4 | 4 | 1.0 |
| 1235 | 4 | 4 | 1.0 |
| 1270 | 4 | 4 | 1.0 |
| 1265 | 4 | 4 | 1.0 |
| 1740 | 4 | 4 | 1.0 |
| 1030 | 4 | 4 | 1.0 |
| 1630 | 4 | 4 | 1.0 |
| 1250 | 4 | 4 | 1.0 |
| 1513 | 4 | 3 | 1.0 |
| 1237 | 3 | 3 | 1.0 |
Menunjukkan 30 puncak terbaik disokong daripada 273 jumlah untuk Lignin.
Bahan yang mungkin
Logik spektrum
Tugasan kumpulan berfungsi menjadi lebih yakin apabila beberapa jalur yang dijangkakan muncul bersama. Gunakan halaman ini untuk mencari puncak yang paling disokong, kemudian sahkan bahawa sampel yang sama menunjukkan corak yang koheren dan bukannya satu hit terpencil.
Penggunaan dunia sebenar
Halaman-halaman ini berguna untuk analisis bahan yang tidak diketahui, penjelasan puncak dalam laporan, penyelesaian masalah polimer, dan mengesahkan sama ada keluarga bahan calon adalah boleh dipercayai secara kimia.
Kesilapan biasa
- Menggunakan satu halaman kumpulan berfungsi sebagai keputusan bahan lengkap tanpa memeriksa spektrum yang lain.
- Dengan menganggap jalur yang paling kuat sentiasa menjadi yang paling diagnostik.
- Melupakan bahawa pemprosesan, bahan tambahan, penuaan, dan campuran boleh mengalihkan atau melebarkan puncak yang dijangkakan.
Nasihat pengesahan
Gunakan DSC, GC-MS, atau TGA apabila beberapa keluarga bahan berkongsi jalur yang serupa atau apabila kesan campuran menyebabkan tugasan FTIR tidak pasti.
Literatur di sebalik penetapan ini
-
1514 cm⁻¹ keyakinan 1.0
“Enzymatic delignification of cm-1 cm-1 this optimized mixture was supported by FTIR studies where peak intensity at 1514 and 1595 corresponding to the aromatic skeletal vibrations of lignin decreased in magnitude after delignification.”
A strategic laccase mediated lignin degradation of lignocellulosic feedstocks for ethanol production DOI: 10.1016/j.indcrop.2016.08.009 -
1050 cm⁻¹ keyakinan 1.0
“These peaks were overlapped with the large and intense For sample L-PS4, the intensity of the -OH groups cm-1 lignin stretching bands at 1050 (Azhar et al.”
Azhar 等 - 2020 - Lignin-Coated PolystyreneTrichloromethylsilane Ab DOI: 10.17576/jsm-2020-4909-12 -
1240 cm⁻¹ keyakinan 1.0
“LLM confirmed rule peak-group candidate”
Physicochemical characterisation of barley straw treated with sodium hydroxide or urea and its digestibility and in vitro fermentability in ruminants DOI: 10.1038/s41598-022-24738-w -
1634 cm⁻¹ keyakinan 1.0
“cm-1 cm-1 at 1510 could be due to aromatic ring vibrations of lignin [35], and peak at 1634 327 represents the carbonyl group in conjunction with an aromatic ring in lignin [36].”
Balan 等 - 2021 - Esterification of residual palm oil using solid ac DOI: 10.1016/j.jtice.2012.07.001. -
3400 cm⁻¹ keyakinan 1.0
“The FTIR spectral features of the extractive free enset fiber and stalk (Fig 5) show similar cm-1, cm-1, cm-1, cm-1 cm-1 peaks around 3400 2945 1746 1380 and 1033 which correspond to different functional groups of cellulose, hemicelluloses”
Characterization of crop residues from false banana /Ensete ventricosum/ in Ethiopia in view of a full-resource valorization DOI: 10.1371/journal.pone.0199422 -
830 cm⁻¹ keyakinan 1.0
“The peak around 830 assoAs thesamples from the north side of (denoted with C-H "-N" ciated with bending of syringyl units, also contributed to in the sample name) were irrigated and samples from the eld”
Bryant 等 - 2023 - Variable lignin structure revealed in Populus leav DOI: 10.1039/d3ra03142j -
1427 cm⁻¹ keyakinan 1.0
“cm-1 characteristic peak at 1735 (acetyl groups in xylan and other nonconjugated carcm-1 cm-1 bonyls), C=O stretch in xylan (hemicelluloses) and the peaks at 1508 and 1427 cm-1 cm-1 show the aromatic skeletal vibration of lignin.”
n-Heptadecane-Impregnated Wood as a Potential Material for Energy-Saving Buildings DOI: 10.3390/f13122137 -
1500 cm⁻¹ keyakinan 1.0
“Significantly, an increase in hemicellulose cm-1 and cellulose peaks around 1700 was determined, while the lignin peak around cm-1 1500 disappeared completely.”
Can 等 - 2023 - Choline Chloride-Based Deep Eutectic Solvent-Treat DOI: 10.3390/f14030569
Lihat Lignin dalam spektrum anda sendiri
Muat naik spektrum FTIR anda dan dapatkan laporan tafsiran penuh — tugasan puncak dengan petikan literatur, padanan perpustakaan, dan analisis berasaskan literatur — dalam beberapa saat.