Flat gasoline

We often store gasoline at home for use in lawn mowers, leaf blowers, or other garden tools. If the gasoline is stored in an open container, it will become flat over time. Flat gasoline does not ignite as easily as fresh gasoline and will make it harder to start a lawn mower. 

Cylindriczd or eliptical containers with flat ends contain liquid at atmospheric pressure (for example, gasoline)... 

For laboratory measurements, samples were measured directly with minimal sample preparation. Prior to analysis, the samples were prepared by placing 4 mL of liquid sample into a Chemplex XRF disposable plastic liquid sample cell fitted with a Chemplex cardboard-moimted mylar window (3.6-pm thickness). The analytical volume of the MWDXRF method is small due to the focusing nature of the incoming X-ray beam. The full size of the excitation beam is about 1 mm x 1 mm on the Mylar window and the sulfur X-rays 1/e escape depth for fuel is 0.1 mm. Therefore, only a small amoimt of the specimen near the center of the film is analyzed during measurement. The sample cell was vented immediately after sample preparation if gasoline or another volatile sample was used. The Mylar film surface was kept dust free, flat, and wrinkle free near the center area of the sample cell to avoid errors during measurement. 

Flat Limits for Phase 2 in California Reformulated Gasoline. 

QUESTION What do you suppose is happening to gasoline when it becomes flat Can you give a molecular reason Flow can it be prevented (Flint Gasoline is a mixture of many different hydrocarbons.)... 

---