Triglyceride — picos de absorción FTIR y asignaciones

Respuesta rápida

Triglyceride se asigna generalmente buscando un grupo recurrente de picos característicos en lugar de un número exacto de libro de texto. La siguiente tabla muestra dónde la literatura coloca con mayor frecuencia este grupo en FTIR, clasificado por evidencia acumulada.

Picos FTIR característicos para Triglyceride

Lógica de espectro

Una asignación de grupo funcional se vuelve más confiable cuando varias bandas esperadas aparecen juntas. Use esta página para encontrar los picos con mayor soporte, luego confirme que la misma muestra exhibe un patrón coherente en lugar de un solo acierto aislado.

Uso en el mundo real

Estas páginas son útiles para el análisis de materiales desconocidos, la explicación de picos en informes, la resolución de problemas de polímeros y la verificación de si una familia de materiales candidata es químicamente plausible.

Errores comunes

• Usar una página de grupo funcional como veredicto completo del material sin verificar el resto del espectro.
• Asumiendo que la banda más fuerte es siempre la más diagnóstica.
• Olvidar que el procesamiento, los aditivos, el envejecimiento y las mezclas pueden desplazar o ensanchar los picos esperados.

Consejo de verificación

Utilice DSC, GC-MS o TGA cuando varias familias de materiales compartan bandas similares o cuando los efectos de mezcla hagan incierta la asignación de FTIR.

Literatura detrás de estas asignaciones

• 1745 cm⁻¹ confianza 1,0

  “[47], who obtained a sharp peak at 1745 associated with the stretching-shaking of ester carbonyl functional sets of triglycerides.”

  Characterizing the Bioactive Ingredients in Sesame Oil Affected by Multiple Roasting Methods DOI: 10.3390/foods11152261
• 2929 cm⁻¹ confianza 1,0

  “The small shoulder cm-1 peak at 3008 (represents C-H stretching symmetric vibration of cis-olefinic doublecm-1 bonds, =CH), sharp peak at 2929 (associated to asymmetric stretching vibration of C-H cm-1 bonds of aliphatic CH groups of trigly”

  Impact of infrared and dry air roasting on the oxidative stability, fatty acid composition, Maillard reaction products and other chemical properties of black cumin (Nigella sativa L.) seed oil DOI: 10.1016/j.foodchem.2019.05.140
• 1657 cm⁻¹ confianza 1,0

  “to the C=O ester stretching vibration of triglycerides, is mainly due to lipids, cm-1 cm-1 the bands centered at 1657 the prominent peak centered at 2927 is mainly due is mainly assigned to to lipids and with little contribution from protei”

  Differentiation in MALDI-TOF MS and FTIR spectra between two closely related species Acidovorax oryzae and Acidovorax citrulli DOI: 10.1186/1471-2180-12-182
• 2924 cm⁻¹ confianza 1,0

  “LLM confirmed rule peak-group candidate”

  Artisanal oil obtained from insects’ larvae (Speciomerus ruficornis): fatty acids composition, physicochemical, nutritional and antioxidant properties for application in food DOI: 10.1007/s00217-021-03752-8
• 1743 cm⁻¹ confianza 1,0

  “Figure 3: ATR-FTIR spectrum of Croton oil from Sipili, Kenya, before baseline subtraction and normalization to the C=O stretch cm-1 at 1743 attributed to the ester carbonyl of the triglycerides.”

  Insights into Geographic and Temporal Variation in Fatty Acid Composition of Croton Nuts Using ATR-FTIR DOI: 10.1155/2018/4739759
• 2922 cm⁻¹ confianza 1,0

  “The sharp peaks at 2922 and 2856 are mainly due to the triglycerides comcm-1 The sharp peaks at 2922 and 2856 cm-1 are mainly due to the triglycerides comprising 83prising 83-86% of total neutral lipids in RBO.”

  The Influence of Emulsifiers on the Physiochemical Behavior of Soy Wax/Rice Bran Oil-Based Oleogels and Their Application in Nutraceutical Delivery DOI: 10.3390/gels9010047
• 1744 cm⁻¹ confianza 1,0

  “The band at wavelength 1744 corresponds functional group of triglycerides, which come from the olive oil present in the composites to the carbonyl functional group of triglycerides, which come from the olive oil present”

  Preparation and Characterisation of Acid–Base-Change-Sensitive Binary Biopolymer Films with Olive Oil and Ozonated Olive Oil Nano/Microcapsules and Added Hibiscus Extract DOI: 10.3390/ijms241411502
• 2951 cm⁻¹ confianza 1,0

  “The bands with the maxima at 2951 and 2852 correspond to the stretching vibrations of -C-H in -CH 3, CH 2, present in the aliphatic groups in triglycerides.”

  Comparative Analysis of Phytochemicals and Antioxidant Properties of Borage Oil (Borago officinalis L.) and Milk Thistle (Silybum marianum Gaertn) DOI: 10.3390/app13042560