Oxalate — FTIR absorption peaks and assignments

Quick answer

Oxalate is usually assigned by looking for a recurring cluster of characteristic peaks rather than one exact textbook number. The table below shows where the literature most often places this group in FTIR, ranked by accumulated evidence.

Characteristic FTIR peaks for Oxalate

Spectrum logic

A functional-group assignment becomes more reliable when several expected bands appear together. Use this page to find the strongest-supported peaks, then confirm that the same sample exhibits a coherent pattern rather than a single isolated hit.

Real-world usage

These pages are useful for unknown material analysis, peak explanation in reports, polymer troubleshooting, and verifying whether a candidate material family is chemically plausible.

Common mistakes

• Using one functional-group page as a complete material verdict without checking the rest of the spectrum.
• Assuming the strongest band is always the most diagnostic one.
• Forgetting that processing, additives, aging, and mixtures can shift or broaden expected peaks.

Verification advice

Use DSC, GC-MS, or TGA when several material families share similar bands or when mixture effects make the FTIR assignment uncertain.

Litteratur bag disse tildelinger

• 885 cm⁻¹ tillid 1,0

  “Figure 2 Magnified view of normalized FTIR absorption spectra of standard compound mixtures cm-1) cm-1) (A) and calcium oxalate stones (B), showing COM (885 and 950 and COD (912 P absorption peaks;”

  Quantitative analysis of calcium oxalate hydrate urinary stones using FTIR and 950/912 cm-1 peak ratio DOI: 10.1016/j.vibspec.2019.03.006
• 784 cm⁻¹ tillid 1,0

  “cm(cid:3)1 oxalate.[17] University] 784 was chosen as the best one to consider for calcium The cm(cid:3)1 ratio of the absorbances of the oxalate peak at 784 with the PB peak at State [Pennsylvania by”

  Salvadori 等 - 2003 - Evaluation of gypsum and calcium oxalates in deter DOI: 10.1081/SL-120026615
• 1721 cm⁻¹ tillid 1,0

  “Initially there is a dramatic increase in the shallow trap absorption which dominates the spectral changes, as well as growth in superimposed adsorbed oxalate peaks at 1721, 1410, 1308, and 1256 cm-1.”

  Savory 等 - 2011 - Shallow Electron Trap, Interfacial Water, and Oute DOI: 10.1021/jp102723u
• 1314 cm⁻¹ tillid 1,0

  “peaks at 1314 and 1591 IR peaks indicative of inner-sphere adsorbed oxalate are also observed for”

  Yoon 等 - 2004 - Adsorption of organic matter at mineralwater inte DOI: 10.1016/j.gca.2004.04.025
• 795 cm⁻¹ tillid 1,0

  “reported in literature due to the incomplete decomposition of the products and two prominent cm-1 cm-1 peaks appeared at 795 (La-O) and 1316 (C-O) reveals the existence of the oxalate ion cm-1 cm-1 while in this research work these peaks ap”

  Study of structural, optical and electrical properties of La3+ doped Mg0.25 Ni0.15 Cu0.25 Co0.35 Fe2-x Lax O4 spinel ferrites DOI: 10.1016/j.physb.2020.412565
• 1600 cm⁻¹ tillid 1,0

  “Above this potential, however, the intensities of these two bands diverge, which can be attributed to 53 cm-1 an increase of the oxalate band at 1600 enhancing the intensity of the glycolate band (see also the increase 54 cm-1).”

  Ethylene Glycol Electrooxidation on Smooth and Nanostructured Pd Electrodes in Alkaline Media DOI: 10.1002/fuce.200900120
• 1315 cm⁻¹ tillid 1,0

  “the chemical composition of the ectopic calcificaThe IR spectra collected by the mIRage™ expericm-1 tions, the presence of IR bands at 1315 clearly mental set up are presented in Figure 8b, each specindicates the presence of calcium oxalate”

  Using mid infrared to perform investigations beyond the diffraction limits of microcristalline pathologies: advantages and limitation of Optical PhotoThermal IR spectroscopy DOI: 10.5802/crchim.196
• 777 cm⁻¹ tillid 1,0

  “The band around 777 has been Opuntia attributed to OCO deformations of calcium oxalate presents in the cladodes [60].”

  Opuntia spp. Fibre Characterisation to Obtain Sustainable Materials in the Composites Field DOI: 10.3390/polym13132085