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ISO 7536: Petroleum Products - Determination of Oxidation Stability of Gasoline - Induction Period Method First Edition; (CEN EN ISO 7536: 1996)

Publication Date: Jan 1, 1994
SDO: ISO: International Organization for Standardization
 DOD Adopted   ANSI Approved Approved

This International Standard specifies a method for the determination of the stability of aviation and motor gasolines in their finished form only, under accelerated oxidation conditions, by measuring the induction period to breakpoint in a pressure bomb apparatus.

The method1) is not intended for the determination of the stability of gasoline components individually, particularly those with a high percentage of low-boiling unsaturated compounds, as they may cause explosive conditions within the apparatus. However, because of the unknown nature of certain samples, the specified bomb assembly includes a safety burst-disc in order to safeguard the operator.

The induction period may be used as an indication of the tendency of gasoline to form gum in storage. It should be recognized, however, that this correlation may vary markedly under different storage conditions and with different gasolines.

1) Further information can be found in the June 1978, January 1979 and June 1986 editions of the Institute of Petroleum Review.

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