No alkane was detected in the middle of the combustion flame of standard sample gasoline, but many alkanes could be found when MTBE, or ethanol was added.

• 在样品汽油火焰高度的一半处，没有探测到烷烃物质，而添加 MTBE 、乙醇后，则探测到多种烷烃物质及其裂解产物。