Q exactive gc orbitrap gc ms ms

Instrument: Q Exactive GC Orbitrap GC-MS/MS (Thermo Fisher, Waltham, MA, USA) coupled with a TD100-XR Thermal Desorption unit (Markes). Column Description: TSP26059-3320 TG-624SILMS GC Column, 30 m × 0.25 mm × 1.4 µm, Thermo.
Method Parameters: TD tubes were desorbed at 280 °C for 5 min and focused on a Material Emissions cold trap (Markes) held at 20 °C (trap low) at a flow rate of 50 mL/min during tube desorption. Trap desorption was carried out over 5 min at 290 °C with a 5:1 split.
The desorbed compounds were separated on a Thermo TG-624SILMS capillary column with a 1.5 mL/min constant flow of helium carrier gas (99.9999%), utilizing the following program: 35 °C for 7 min, followed by an increase to a final temperature of 250 °C at a rate of 4 °C/min. The final temperature was held for 19 min. Q-Exactive was operated in MS mode, and electron ionization (EI) mode at 70 eV was used with a 60,000 resolution over a mass range of m/z 33–490. The transfer line and ion source temperatures were set to 230 °C.

The crystal structure of catalyst was characterized by X-ray diffraction (XRD) (Ultima IV, Rigaku) at 40 kV and 40 mA (Cu Kα X-ray radiation source) with a scanning speed and step interval of 4^o min⁻¹ and 0.01^o, respectively. Transmission electron microscope (TEM) images were obtained using a HT7700 TEM (Hitach). The solid diffuse reflectance spectra (DRS) were collected on a UV–Vis–NIR spectrophotometer (Cary 5000, Varian). NMR tests were conducted on Bruker AVANCE III NMR spectrometer (500 and 600 MHz). The high-performance mass spectrometry was conducted by a Q Exactive GC Orbitrap GC-MS/MS (Thermo Scientific).