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Determination of the ageing stability of light heating oil. (In German). H. Jungbluth and G. Lohmann. Erdol Erdgas Kohle, March 1997, 113(3), 133--136.

Crude oil quality, the refinery process and storage conditions are considered responsible for ageing. Hence, no single ingredient is able to provide sufficient control of ageing for all commercially available middle distillates. Multiphase additives, such as antioxidants and metal deactivators, with a broad working spectra are the better alternatives. The `Rancimat' method is described which is an easy, quick test which has a very slight standard deviation and gives good and reproducible results. 5 refs.
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