Pbx Simulated Wastewater Before And After The Ozone Oxidation
1129 Words5 Pages
PBX simulated wastewater before and after the ozone oxidation was extracted thrice with dichloromethane. The obtained dichloromethane extract was dried over anhydrous sodium sulfate and then analyzed using an Agilent Technologies 7890A-5975C Gas Chromatography-Mass Spectrometry (GC/MS) (Agilent Technologies, America) for the final product analysis of gas phase system. Approximately 1.5 mL sample was heated from room temperature to 330 °C and kept at this temperature for 15 s. The chromatographic separation was performed using a 3 m 250 um 0.25 um HP-5MS elastic quartz capillary column with the following program: the initial temperature was 40 °C and increased to 100 °C at a rate of 5 °C/min, then further increased from 100 °C to 280 °C at a rate of 15 °C/min, from 280 °C to 330 °C at a rate of 30 °C/min. The mass data were obtained at the ion source temperature and the detector voltage of 230 °C and 70 eV, respectively. The mass scan ranged from 20 u to 500 u.
2.10 UPLC/Q-TOF-MS analysis of final oxidation products of PBX
The PBX simulated wastewater before and after the ozone oxidation was analyzed using an Ultra High Performance Liquid Chromatography with Tandem Quadrupole Time of Flight Mass Spectrometer (UPLC/Q-TOF-MS) (Waters, American) after concentrating, for the final products analysis of liquid phase system. The conditions of UPLC/MS were: column, Waters BEH C18, 1.7 μm, 50 2.1 mm2; mobile Phase A, 80% water; mobile Phase B, 25% acetonitrile; flow rate, 0.2