[help]! ! ! ! ! Rapid determination of TBHQ content in oil! ! ! !
Weigh 20g oil sample into a beaker, add 5ml of 25% dimethyl ammonia solution, shake well for 65438 0-2min, add 65438±00ml methanol solution, and shake well until completely mixed. Let it stand for about 10 minute, and observe the color of alcohol layer. Displaying pink to red indicates the presence of TBHQ. If TBHQ is small, the observation time will be long.