Amino acid — Puncak serapan FTIR dan tugasan

Jawapan pantas

Amino acid 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 Amino acid

Menunjukkan 30 puncak terbaik disokong daripada 152 jumlah untuk Amino acid.

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

• 1029 cm⁻¹ keyakinan 1.0

  “Earlier studies have established that the FTIR bands stretching in amino acid has also caused a band at 1029 cm-1 [18,19].”

  Aziz 等 - 2017 - From Insulating PMMA Polymer to Conjugated Double DOI: 10.3390/polym9110626
• 1610 cm⁻¹ keyakinan 1.0

  “The cm-1 is increasing with increasing temperweak band at 1610 ature and may tentatively be assigned to the amino acid side chain in tyrosine (23).”

  Bertram 等 - 2006 - Heat-induced changes in myofibrillar protein struc DOI: 10.1021/jf0514726
• 1234 cm⁻¹ keyakinan 1.0

  “stretching mode of groups of serine, threonine, and tyrosine of proteinEE A comparison of the spectra showed significant changes in AmideIII(NAHbending,CANstretch,CACstretch) 1234 Amide III absorbance throughout the whole range tested, i.e.”

  Application of infrared spectroscopy in the identification of Ewing sarcoma: A preliminary report DOI: 10.1016/j.infrared.2017.05.006
• 1607 cm⁻¹ keyakinan 1.0

  “The bands cm-1) originating from the amino acid side chains vibrations are also observed (1607 [21].”

  A Preliminary Study of FTIR Spectroscopy as a Potential Non-Invasive Screening Tool for Pediatric Precursor B Lymphoblastic Leukemia DOI: 10.3390/molecules
• 3441 cm⁻¹ keyakinan 1.0

  “Regions of approximately 2352-2938 (-C-C2 cm-1 H-) alkyl absorption peaks and approximately 3441 (-N-H-) amino acid absorption peaks were observed.”

  Chang 等 - 2017 - Material Characteristics of Hair Cuticles after Ha DOI: 10.18494/SAM.2017.1707
• 1731 cm⁻¹ keyakinan 1.0

  “A band at 1731 represents characteristic of cm-1 α-amino acid hydrochlorides.”

  Crystal Growth, Spectral, Optical, Laser damage, Photoconductivity and Dielectric Properties of Semiorganic L-cystine hydrochloride Single Crystal DOI: 10.1016/j.saa.2015.06.113
• 1400 cm⁻¹ keyakinan 1.0

  “II band at 1400 indicates the generation of amino acids β-Carotene confirming Bioaccessibility of in In Vitro Digestion.”

  Remodeling of β‑Carotene-Encapsulated Protein-Stabilized Nanoparticles during Gastrointestinal Digestion In Vitro and in Mice DOI: 10.1021/acs.jafc.0c05322
• 2360 cm⁻¹ keyakinan 1.0

  “The medium doublet bands around 2360 revealed the typical S-H stretching of L-cysteine amino acid, which suggested the possible”

  Mesoporous magnetite nanoparticles synthesis using the Peltophorum pterocarpum pod extract, their antibacterial efficacy against pathogens and ability to remove a pollutant dye DOI: 10.1016/j.molstruc.2018.10.042