Analysis of K270 parameter in Olive Oil

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.

Analyzer

You can perform K270 parameter test in olive oil with OxiTester: Analyzer to test olive oil and other vegetable oils like rapeseed oil, sunflower oil, castor oil, nut oil and so on. With OxiTester you can detect also acidity (FFA), Peroxide Value, and Pholifenols in vegetable oils.

Fetures & benefits of K270 parameter test with OxiTester

• Does not require complex and expensive instrumentation, such as a spectrophotometer or quartz vials
• Unlike the official method, it does not use toxic solvents
• Does not require sample preparation as opposed to official methods

Method

End point test.
Color reading at 270 nm.
Test time: immediate.
It is possible to perform several test sessions with a maximum of 14 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.

{slider id="1" title="Composizione del Kit e dei Reagenti" direction="0"}

Code *300570: The kit, designed for 100 tests, comprises:

• R1: bottle containing alcoholic mixture.
• 100 test cuvettes with caps.

Sample handling and usage of curves

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

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