Analysis of K270 parameter in Olive Oil

CDR OxiTester: the fast, simple and reliable olive oil testing system, to be used directly at theoil mill, in the oil processing plant or at the time of purchase In addition to providing useful information on the quality of olive oil and on its degree of oxidation , this test enables to identify rectified oil added to virgin olive oil, by leveraging the fact that mechanically extracted oils do not contain double or triple conjugated bonds that typically form during rectification.

Rectified oils therefore exhibit high UV absorbance values, specifically in the 270 nm region, which are significantly higher as compared to those of virgin and extra virgin oils. The greater absorption in the 270 nm region, during the most advanced oxidation stages, is determined also by the formation of ketone groups.

Analyzers to test K270 in Olive Oil 

You can determine the value of K270 in olive oil with CDR OxiTester for analysis of olive oil in any stage of olive oil production line. You can perform the test in oil mill. 


CDR OxiTester: the fast, simple and reliable olive oil testing system


Analyses Olive Oil:
Peroxide Value
Acidity (FFA)
Total Polyphenols/OSI
Sugars in Olives


End point test.
Test time: immediate.
It is possible to perform several test sessions with a maximum of 16 samples.

Principle of the test

The oil sample is dissolved in an appropriate solvent and the absorbance of the solution is read at 270 nm. Absorbance values are expressed as specific extinction E 1% 1 cm (1% extinction of a fatty substance in the prescribed solvent at a thickness of 1 cm), which is generally indicated as K and sometimes called extinction factor.

Calibration Curve / Correlation Data

The test calibration curve, obtained using reference methods, confirms the excellent linearity of the system in all the testing range.

K270 test with CDR OxiTester calibration curve

Reagent test Kits

The reagents are packaged in 4 bottles of 25 mL + 100 empty cuvettes and 100 caps

Code. 300570: 100 tests.

The reagents have a shelf-life of 24 months.

Processing Sample

Oil: collect as is (olive oil, seed oil, nut oil, etc). 

Measuring Range

Test Measuring Range Resolution Repeatability
K 270 0.02 - 1.57 0.001 0.03

Reagents developed by CDR S.r.l - Quality System Certified ISO 9001 Ed. 2015 - Certificate n. 9115

Take a Look at CDR OxiTester
olive oil testing in few minutes
easy to use, compliance with AOCS methods

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With the CDR system, you can perform your tests in total autonomy

Neither skilled staff nor a dedicated external laboratory is needed to use our systems. CDR FoodLab® optimizes traditional testing methods, making them faster and easier, while guaranteeing accuracy standards in line with the reference methods.

Analytical kit

CDR FoodLab® Analysis Systems use disposable pre-vialed reagents specifically developed by the research laboratories of CDR. The use of pre-vialed reagents and the analytical procedures allow:

  • a sample preparation that is quick and easy, when needed at all;
  • making analytical procedures extremely fast and easy;
  • removing all needs for complex calibration procedures.

Reagents come in aluminum packages containing 10 test tubes each to perform 10 tests (or packages for 100 tests containing 10 single packages of 10 test tubes each).

Just a few steps and results are yielded right away

Just a few steps will suffice to carry out your analysis in a rapid way in total autonomy. The system is composed of both the analyzer based on photometric technology and a kit of low toxicity, pre-vialed reagents, developed by CDR.

CDR FoodLab® is cost-effective because it does not require the use of expensive equipment and does not entail maintenance, assistance or calibration costs.
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