How can you identify starch from FTIR?

Quick answer

starch 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 starch, 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 6.1

  starch

  Hussain 等 - 2020 - Visco-thermal and structural characterization of w DOI: 10.1007/s13197-020-04327-3
• confidence 6.1

  starch

  Sayka 等 - 2020 - Synthesis and Spectroscopic Characterization of an DOI: 10.1002/star.201900056.
• confidence 6.1

  starch

  Infrared Spectroscopy with Heated Attenuated Total Internal Reflectance Enabling Precise Measurement of Thermally Induced Transitions in Complex Biological Polymers DOI: 10.1021/ac303552s
• confidence 6.1

  starch

  Surface modification of nanosatrch using nano silver: a potential antibacterial for food package coating DOI: 10.1007/s13197-017-2996-7
• confidence 6.1

  starch

  Physical-Mechanical Behavior and Water-Barrier Properties of Biopolymers-Clay Nanocomposites DOI: 10.3390/molecules26216734
• confidence 6.1

  starch

  Islam 等 - 2021 - Preparation and Evaluation of Rice Bran-Modified U DOI: 10.1002/gch2.202000044.
• confidence 6.1

  starch

  Gamma radiation application to rice: Reduced glycemic index in relation to modified carbohydrate observed in FTIR spectra DOI: 10.1016/j.crfs.2020.12.002
• confidence 6.1

  starch

  Palaeoproteomic Profiling of Conservation Layers on a 14th Century Italian Wall Painting DOI: 10.1002/anie.201713020
• confidence 6.1

  starch

  Turksoy 等 - 2020 - Effect of aging at different temperatures on LAOS DOI: 10.1016/j.foodhyd.2018.12.055
• confidence 4.9

  starch

  Encapsulating probiotics in novel resistant starch wall material for production of rice flour extrudates DOI: 10.1016/j.lwt.2020.110839