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Peroxide value in essential oils

Peroxide value in essential oils

You can carry out Analysis of Peroxide value in essential oils with OxiTester using micro quantities of raw sample with practical, fast and extremely accurate methods. So in junt a few menutes you can determine peroxides number of an essential oil to verify its tendency to go rancid.

The chemical test for the determination of oil oxidation is very important to check product status of preservation in order to determine its shelf life.
If peroxides value is high, the skin irritation coefficient will consequently increase and therefore many fragrances and essential oils have to have a peroxides index lower than a certain value, fixed by international authorities that regulate the usage of such substances as IFRA, the International Fragrances Association (www.ifraorg.org) or the European Flavour and Fragrance Association (www.effa.be).

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Instruments to Use

OxiTester

Reagents

R1 (in cuvette): alcoholic mixture
R2 (in vial): Redox solution

Test method

End Point test
Colorimetric reaction at 505 nm
Testing time: 5-8 minutes
It is possible to carry out several test sessions with a maximum of 14 samples.
Calibration can be performed by aligning the test to reference values.

Test principle

R-O-O-R peroxides oxidize Fe++ ions. The Fe+++ 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. CDR innovative method simplifies and speeds up the standard procedure, because it enables the test to be carried with micro-quantities and to be applied to fats that are difficult to extract.
Oil as is (extracted from olive, seeds, nuts, etc.).
Solid fats: melted with bain-marie before collection (animal fats, palm oil, etc.).

Sample

Extractable fats: extract the fatty part following the instructions provided in the test method (butter, cream, margarine, semi-finished products, etc.).