关键词: 汽油组分, 实际胶质, 相关分析, 最小二乘法

Abstract: Variance patterns and influencing factors of motor gasoline compositions’ existent gum are examined by means
of 43 ℃accelerated storage test method. The linear regression equation between the existent gum and the storage time are
established by the least square method. Correlation of the existent gum formation rate and chemical constitution are investigated
with the correlation analysis method. Results indicate that most compositions’ existent gum has a linear relationship with the
storage time，obvious correlation existing between existent gum formation rate“k ”and hydrocarbon composition，in which
the maximal acceleration of existent gum producing is incurred by cyclic and isomeric olefins，while the maximal inhibition by
paraffin hydrocarbons. Aromatic hydrocarbons’ effect on existent gum is not obvious. Existent gum is relevant to acidity and
colority.

Key words: gasoline composition, existent gum, correlation analysis, least square method