选择同一时期入库、入库质量均符合国家四级以上质量标准规定、在同一地理位置采用常规密闭储藏的罐存四级菜籽油,在近两年的储存期间,对其定期抽样测定酸值及过氧化值变化情况.结果表明,经过近两年的密闭储存,酸值、过氧化值均有不同程度的上升,但酸值上升的幅度非常小,过氧化值虽有明显升高,但上升幅度也不大.%4-class rape oil stored at the same time and the same place was chosen in this test. Its acid value and peroxide value were taken the regular measurement during 2 years storage. The results showed that both acid value and peroxide acid had increased in varying degrees, but acid value had a little rise, while peroxide acid had obviously rise, but the tendency of change kept stable.
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