Desorption electrospray ionization schematic

Figure 2.7. Schematic of a desorption electrospray ionization (DESI) source.

Fig. 8. Schematic diagram of the desorption electrospray ionization (DESI) source. Reproduced with permission from Cotte-Rodriguez et al. [14]. Copyright 2005 American Chemical Society.

FIGURE 3.15 Schematic of a typical DESI experiment. (From Weston et al. Direct analysis of pharmaceutical drug formulations using ion mobility spectrometry/quadrupole-time-of-flight mass spectrometry combined with desorption electrospray ionization Anal. Chem. 2005, 77(23), 7572-7580. 

FIGURE 4.4 A schematic of desorption electrospray ionization (DESI). The eleetrosprayed droplets from an ESI source impinge on the surface of the sample, and the ions desorbed from the surface are analyzed by MS or IMS. (From Wikipedia, http //en.wikipedia.org/wiki/ File DESl ion source.jpg)... 

Fig. 7.6 Schematic diagram of the setup and ion source for desorption electrospray ionization (DESI-MS). (Adapted from N. Talaty et al. Analyst, 130, 2005, 1624-1633 with permission of the PCCP Owner Societies)...

Figure 2.9 Schematic diagram of desorption electrospray ionization source. The letters a, P, and d represent the spray impact angle, desorbed ions collection angle, and the distance between spray tip and the surface, respectively.

FigureBl.7.2. Schematic representations of alternative ionization methods to El and PI (a) fast-atom bombardment in which a beam of keV atoms desorbs solute from a matrix (b) matrix-assisted laser desorption ionization and (c) electrospray ionization.

The chemical compositions of the isolated Au SR clusters were investigated by mass spectrometry [15,16,18, 22,32-35]. TEM was used to confirm that the species detected by the mass spectrometer represents the clusters in the sample. Figure 3a is a schematic representation of the top view of the mass spectrometer, which consists of five stages of differentially pumped vacuum chambers. The apparatus accommodates two t5 pes of ion sources, electrospray ionization (ESI) and laser-desorption ionization (EDI), and a time-of-flight (TOE) mass spectrometer with a reflectron. Details of the apparatus and the measurement protocols are described below. 

Figure 14.1 Schematic view of a mass spectrometer. Its basic parts are ion source, mass analyzer, and detector. Selected principles realized in modern mass spectrometers are assigned El—electron impact. Cl—chemical ionization, FAB—fast atom bombardment, ESI—electrospray ionization, MALDI—matrix-assisted laser desorption/ionization. Different combinations of ion formation with mass separation can be realized.

FIGURE 14.4 Schematic representation of solid phase microextraction (SPME) fiber desorption chamber (From McCooeye et al., Qnantitation of amphetamine, methamphet-amine, and their methylenedioxy derivatives in urine by solid-phase microextraction coupled with electrospray ionization high-field asymmetric ion mobility spectrometry-mass spectrometry, AnaZ. Chem. 2002, 74, 3071-3075. With permission.)... 

Fig. 2 (A) Schematic view of the TOF mass spectrometer equipped with electrospray ionization (ESi) and iaser desorption ionization (LDI) sources. (B)The detaiis of the ESI source. ACS Pubiishing. Reproduced with permission. ...

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