The analysis of the breakthrough gas was performed using a quadrupole mass spectrometer.
Real-time measurements of CO conversion are done using a quadrupole mass spectrometer.
Hydrogen thermal desorption analysis (TDA) was performed in vacuum at 10−6 Pa using a quadrupole mass spectrometer.
Oxygen consumption and formation of the reaction products were monitored using a quadrupole mass spectrometer (Pfeiffer Vacuum OmniStar 200).
Hydrogen thermal desorption analysis (TDA) was performed under vacuum at 10−6 Pa using a quadrupole mass spectrometer.
Corresponding spots were excised from stained gels, digested, and analyzed using a quadrupole TOF Synapt G2-S tandem mass spectrometer.
Protein identity was determined by mass spectrometry using a Quadrupole time-of-flight mass spectrometer with electrospray ionization (ESI-QTOF-MS) (Waters Corp., Milford, MA, USA).
The reaction product ions are mass analysed using a quadrupole mass spectrometer and detected by a secondary electron multiplier (SEM).
Nickel and iron were measured using a quadrupole-based ICP-MS (7500ce, Agilent Technologies, Tokyo, Japan), equipped with a MicroMist Nebulizer (Agilent Technologies).
We used a quadrupole mass spectrometer (Trace-MS; Fisons/Thermoquest, Antwerp, Belgium).
This configuration is often achieved by using a fiber-coupled quadrupole piezoelectric tube with a graded refractive index lens [20].
