7. Then the ultrasonic machine for 1 hour 8. Use the syringe to suck gasoline into a 10 μl vial containing dichloromethane 9. All samples were analyzed by using Gas Chromatography / Flame Ionization.
7. Then lead into the ultrasonic for 1 hours 8. Use syringe size 10 thermal l suck gasoline put in vial with dichloromethane. 9. Take a sample of all analysis techniques Gas Chromatography / Flame Ionization