Benzene,toluene,ethylbenzene and xylenes(BTEX) are components which are commonly found in crud oil,contaminated ground water and air.

• 单环芳烃苯、甲苯、乙苯和二甲苯(简称BTEX)是石油的重要组分,也是环境中需要重点监测的致癌污染物。