for qualitative measurementsBenzene . 2 mL Toluene . 2 mLo-Xylene . 2 mLm-Xylene . 2 mLp-Xylene . 2 mL Ethylbenzene . 2 mL Propylbenzene . 2 mL Cumene . 2 mL Butylbenzene . 2 mL Isobutylbenzene . 2 mL sec-Butylbenzene. 2 mL tert-Butylbenzene . 2 mLp-Cymen