Rancimat oxidation tests are done at standard conditions of 110 degree celcius, literatures have given evidence of conducting it at temperatures above 110 degree celcius. What is the reason why it is not conducted below 110 degree celcius?
The main reason for conducting the test at a temperature of 110 °C, is to accelerate the oxidation process and make decisions in less time on the quality of the sample. Some researchers performed with the Rancimat test equipment at a lower temperature, because the test when performed at 100 °C, it is not representative of the reality.
The determination of the lifetime of biodiesel is based on the Arrhenius equation performing the assay at least two currently recommended temperatures 100 and 110 °C.
hi,
I feel that rancimat works as isothermal DSC or chemilumineence OIT used for minotoring polymer oxidation. If you look at some CL curves (see Richaud et al, Chem Phys Lipids, 2012), you will see that lowering temperature results in:
- higher degradation time
- onset less clearly distinguishable
regards
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