Sentence examples for by performing MSn experiments from inspiring English sources
Preconcentration of ozonated samples was necessary in order to gain more information about the molecular structure of the identified OTPs by performing MSn experiments.
Once the main OTPs of the target compound are identified, their structure can be elucidated by infusing preconcentrated ozonated samples directly into the mass spectrometer in order to perform MSn experiments at high resolution.
Finally samples were reconstituted in 50%H2O-50H2O-50N (v/v) and passed through Millipore Millex-LG syringe filters (filter diameter 4 mm, pore size 0.22 μm) before direct infusion into the mass spectrometer to perform MSn experiments.
Melatonin mass spectrum was determined by performing MSn reactions using a melatonin standard, as described in "Methods" section.
For performing the MSn experiments in MS1 a window of 1 m/z was used to isolate the mass of interest.
Similarly to the fragments observed during the MSn experiments performed with OTP-276, the elemental composition of the MS3 and MS4 product ions of OTP-318 pointed towards a partial preservation of the ring structure of E1.
Multiple stage tandem mass spectrometry (MSn) experiments were performed on LTQ Velos Pro system equipped with a heated electrospray ionization source (HESI) (Thermo Fisher Scientific, Bremen, Germany).
The MSn experiments were performed using the Orbitrap mass analyzer at a resolution of 100,000 in a mass range of m/z 50 500.
Where specified, targeted MSn experiments were performed using collision-induced dissociation (CID) mode using the linear ion trap analyzer of the LTQ Orbitrap machine [24], [29].
Direct infusion of these extracts into the mass spectrometer allowed performing multi-stage tandem mass spectrometry (MSn) experiments with these ions.
