1 and 2mL/min. Because there were some water in the solution, it was necessary to treat the solution with
sodium sulphate. At last, the solution was concentrated to 5ml in 60? water bath. The sample was stored
in 4? until analyzing.
2.2.5. GC/MS analysis
GC?MS analyses were performed with HP25 (Agilent Technologies, USA). Instrument parameters
and operating conditions were as follows: column, DB25 (30m x 0.25mm?0. 25?m); Temperature:
injector 250?; Carrier gas: Helium, at a flow rate of 1.1 mL/min. Sample injection of 1?L sample was
performed in split less mode. The column oven temperature was maintained at 40? for 2 min then
programmed at 7?/min to 270? which was held for 5 min. The injection port and detector temperatures
were 250 and 270 ?, respectively. The mass spectrometer was operated at electron-impact positive
ionization mode (EI+), electron energy 70 eV; scanning was from 30 to 450 amu. The source temperature
was 200?. Identification of the organic compounds was performed by comparing EI spectra and
chromatographic retention times with those of commercially available authentic reference compounds.
3 Results and discussion
1 and 2mL/min. Because there were some water in the solution, it was necessary to treat the solution withsodium sulphate. At last, the solution was concentrated to 5ml in 60? water bath. The sample was storedin 4? until analyzing.2.2.5. GC/MS analysisGC?MS analyses were performed with HP25 (Agilent Technologies, USA). Instrument parametersand operating conditions were as follows: column, DB25 (30m x 0.25mm?0. 25?m); Temperature:injector 250?; Carrier gas: Helium, at a flow rate of 1.1 mL/min. Sample injection of 1?L sample wasperformed in split less mode. The column oven temperature was maintained at 40? for 2 min thenprogrammed at 7?/min to 270? which was held for 5 min. The injection port and detector temperatureswere 250 and 270 ?, respectively. The mass spectrometer was operated at electron-impact positiveionization mode (EI+), electron energy 70 eV; scanning was from 30 to 450 amu. The source temperaturewas 200?. Identification of the organic compounds was performed by comparing EI spectra andchromatographic retention times with those of commercially available authentic reference compounds.3 Results and discussion
การแปล กรุณารอสักครู่..