Chemical analysis of ozonized theobroma fat

Maritza F. Díaz Gómez, Goitybell Martínez Téllez, Maikel Arteaga Cruz, Rafael Garcés Mancheño

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)


Ozonized theobroma fat is used as raw material in the manufacture of pessaries and cosmetic creams. Ozonization of theobroma fat with water was carried out at different applied ozone dosages, and the resultant PV, acid value, iodine value, total hydroperoxide content, and FA content were determined. PV and total hydroperoxide content showed a notable increase with applied ozone dosage up to 35.7 mg/g. Acid value varied slightly from 4.1 to 9.9 mg KOH/g, and the iodine value fell to zero. PV and total hydroperoxide content increased slightly with a higher applied ozone dosage. The comparison of total hydroperoxide measurement using ferrous oxidation in xylenol orange assay and traditional iodometric assay for PV determination showed a significant linear correlation. Small amounts of oleic acid were found in ozonized theobroma fat samples with iodine value equaling zero, which demonstrated that iodine value determination is an inexact assay. During ozonization of theobroma fat, an increase in acid value of 18.9-fold with respect to the initial value was observed owing to decomposition of peroxide.

Original languageEnglish
Pages (from-to)943-946
Number of pages4
JournalJAOCS, Journal of the American Oil Chemists' Society
Issue number11
Publication statusPublished - Nov 2006
Externally publishedYes


  • Acid value
  • Fatty acids
  • Gas-liquid chromatography
  • Hydroperoxides
  • Iodine value
  • Oleic acid
  • Ozonized theobroma fat
  • Peroxide value

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Organic Chemistry


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