How can you identify ethanol from FTIR?

Quick answer

ethanol is usually reported with a recurring pattern of peaks and functional-group evidence. The most useful approach is to cross-check at least two characteristic peaks before treating it as a match, then verify whether the full spectrum still fits the same material family.

Peak interpretation

Possible materials / groups

Spectrum logic

The logic here is evidence aggregation: repeated literature mentions of ethanol, repeated peak positions, and repeated functional-group associations. A strong material hypothesis should still be supported by multiple peaks that agree with each other, not by one headline band alone.

Real-world usage

This page is designed for polymer identification, incoming-material QC, unknown plastic analysis, recycled-content review, and literature-backed interpretation of reference spectra.

Common mistakes

• Calling a material match too early because one famous peak is present.
• Ignoring sample prep, fillers, oxidation, water, or additives that can change the apparent pattern.
• Using literature evidence without checking whether your own sampling mode and spectrum quality are comparable.

Verification advice

Use DSC, GC-MS, or TGA to validate the material hypothesis when the peak pattern is ambiguous or mixed.

Literature behind this page

• confidence 4.0

  ethanol

  Alcohol Determination in Distilled Alcoholic Beverages by Liquid Phase Fourier Transform Mid-Infrared and Near-Infrared Spectrophotometries DOI: 10.1007/s12161-016-0566-7
• confidence 4.0

  ethanol

  Measurement of entrainer effects of water and ethanol on solubility of caffeine in supercritical carbon dioxide by FT-IR spectroscopy DOI: 10.1016/j.supflu.2005.12.005
• confidence 4.0

  ethanol

  Assessment of quality of commercial hand sanitizers using Fourier transform infrared spectroscopy and gas chromatography DOI: 10.1016/j.mex.2023.102274
• confidence 4.0

  ethanol

  An in situ FTIR spectroscopic study of the electrochemical oxidation of ethanol at a Pb-modified polycrystalline Pt electrode immersed in aqueous KOH DOI: 10.1039/c3cp53194e
• confidence 4.0

  ethanol

  Li Yan-Yan 等 - 2013 - Electrooxidation of Ethanol on Platinum Nanocubes DOI: 10.7503/cjcu20120468
• confidence 2.5

  Ethanol

  Kinetic and Stoichiometric Modeling-Based Analysis of Docosahexaenoic Acid (DHA) Production Potential by Crypthecodinium cohnii from Glycerol, Glucose and Ethanol DOI: 10.3390/md20020115
• confidence 2.5

  Ethanol

  Structural and Vibrational Study of Molecular Interaction in a Ternary Liquid Mixture of Benzylamine, Ethanol and Benzene DOI: 10.21203/rs.3.rs-649250/v1
• confidence 2.5

  ETHANOL

  SIMULATION AND DIAGNOSTICS OF PLASMACHEMICAL PROCESSES DURING MICROWAVE PLASMA SYNTHESIS OF GRAPHENE NANOSHEETS FROM ETHANOL DOI: 10.37904/nanocon.2020.3691
• confidence 2.5

  ethanol

  Brønsted acidic ionic liquids: the dependence on water of the Fischer esterification of acetic acid and ethanol DOI: 10.1016/j.molcata.2003.09.035
• confidence 0.9

  ethanol

  FTIR–ATR spectroscopy applied to quality control of grape-derived spirits DOI: 10.1016/j.foodchem.2016.02.128