CDR OxiTester - the analysis system of olive oil used at the olive oil mill without specialised personnel or a chemical laboratory

Peroxide Value test in Olive oil

The amount of peroxides of oil indicates the degree of primary oxidation and therefore its likeliness of becoming rancid. A lower number of peroxides indicates a good quality of oil and a good preservation status.

Unsaturated free fatty acids react with oxygen and form peroxides, which determine a series of chain reactions that generate the production of smelling volatile substances. Those reactions are accelerated by high temperature and by light and oxygen exposure.

CDR innovative method simplifies and speeds up the standard procedure, because it enables the analysis to be carried out using micro-quantities of samples.

Features and benefits of CDR OxiTester

The peroxide value of the olive oil indicates its primary oxidation state and thus its tendency to go rancid. In just 3 minutes, without titration, it is possible to carry out the analysis of the peroxide value of extra virgin olive oil or olive oil, not only in the laboratory, but also at the olive oil mill, along the production line of an oil mill, at acceptance or at the purchase and sale stage, using the CDR OxiTester analysis system that simplifies and speeds up the official method. The results are correlated with those of the reference methods.


Principle of the test

R-O-O-R peroxides oxidize Fe2+ ions. The Fe3+ ions resulting from oxidation are grouped and form a red complex. Its colorimetric intensity, measured at 505 nm, is directly proportional to the concentration of peroxides in the sample. Results are expressed as meqO2/Kg.

Correlation curve with reference methods

CDR method shows a very good correlation with AOCS Official Method Cd 8-53.


In addition, the international reference laboratory Campden BRI carried out comparative tests between the CDR method and the UKAS accredited titration method used by Campden BRI (Campden BRI Method TES-AC-360 based on ISO 3960 or AOCS Cd 8b-90 or AOAC 965.33): the correlation coefficient was R² = 0.9681, value that shows that the correlation between the two methods is very good.

Reagent test Kits

Measuring range

AnalysesMeasuring rangeResolutionRepeatability

Analyzers for quality control of olive oil


CDR OxiTester

  • Complete analysis panel, supplied already configured
  • Up to 16 determinations simultaneously
  • Possibility of carrying out analyses of the same sample 
  • Integrated printer
  • Full connections (LAN - USB - Bluetooth barcode/QR code reader)

CDR OxiTester Jr

  • Partial analysis panel, supplied configured with 3 analyses of your choice, implementable
  • Up to 3 determinations simultaneously
  • Wireless connection to external printer
  • USB connections