Abstract: Dissolved oxygen has adverse effects on the properties or processing performance of oil products like crude oil, fuels and industrial chemicals. However, current detection methods have problems such as cumbersome operation, poor adaptability or poor data precision. To solve these problems, liquid phase rapid extraction method was applied to determine the dissolved oxygen in oil products using oxygen sensor as detector. The results indicated that the determination time was less than 3 min, the recovery rate of oxygen was between 94% and 104%, the mean standard deviation for five parallel determinations was less than 3% and the detection limit was less than 1.5 mg/L.

Key words: dissolved oxygen, rapid liquid phase extraction method, oil products