Big Chemical Encyclopedia

Chemical substances, components, reactions, process design ...

Articles Figures Tables About

Ring electrodes

Figure Bl.7.14. Schematic cross-sectional diagram of a quadnipole ion trap mass spectrometer. The distance between the two endcap electrodes is 2zq, while the radius of the ring electrode is (reproduced with pennission of Professor R March, Trent University, Peterborough, ON, Canada). Figure Bl.7.14. Schematic cross-sectional diagram of a quadnipole ion trap mass spectrometer. The distance between the two endcap electrodes is 2zq, while the radius of the ring electrode is (reproduced with pennission of Professor R March, Trent University, Peterborough, ON, Canada).
The reflectron consists of a series of ring electrodes, on each of which is placed an electric potential. The first ring has the lowest potential and the last ring the highest to produce an electrostatic field that increases from the front end of the electron to the back. [Pg.191]

As the number of rods is increased, the rate of increase in ion efficiency falls off, and the devices become more difficult to construct. Consequently, quadrupoles and hexapoles are used most frequently in commercial instruments. More recently, the concept has been extended to a set of ring electrodes, which are the most efficient ion guides (Figure 49.8). Flowever, although the ring set (ion tunnel) uses RF fields similar to the ones outlined here, there are sufficient differences that are not discussed here. [Pg.382]

Fig. 3. Schematic diagram of an ion trap where A and B represent end cap electrodes, C the ring electrode, Tq the internal radius of C, and the internal... Fig. 3. Schematic diagram of an ion trap where A and B represent end cap electrodes, C the ring electrode, Tq the internal radius of C, and the internal...
The quadrupole ion-trap, usually referred to simply as the ion-trap, is a three-dimensional quadrupole. This type of analyser is shown schematically in Figure 3.5. It consists of a ring electrode with further electrodes, the end-cap electrodes, above and below this. In contrast to the quadrupole, described above, ions, after introduction into the ion-trap, follow a stable (but complex) trajectory, i.e. are trapped, until an RF voltage is applied to the ring electrode. Ions of a particular m/z then become unstable and are directed toward the detector. By varying the RF voltage in a systematic way, a complete mass spectrum may be obtained. [Pg.58]

FIGURE 4.7 Rotating ring-disk electrode (1) disk electrode (current/p) (2) ring electrode (current 7j ). [Pg.68]

Figure 11.18 Linear cyclic voltammograms of a FePc/C disk electrode and corresponding oxidation current of a Pt ring electrode maintained at 1.2 V vs. RHE, recorded at 2500 rev min in an 02-saturated 0.5 M H2SO4 electrolyte (temperature 20 °C, sweep rate 5 mV s ). Figure 11.18 Linear cyclic voltammograms of a FePc/C disk electrode and corresponding oxidation current of a Pt ring electrode maintained at 1.2 V vs. RHE, recorded at 2500 rev min in an 02-saturated 0.5 M H2SO4 electrolyte (temperature 20 °C, sweep rate 5 mV s ).
Here we have to deal with three types (see Fig. 3.68), viz. (a) the rotating disc electrode (RDE), and (b) the rotating ring electrode (RRE) and the rotating ring-disc electrode (RRDE). The construction of the latter types suits all purposes, i.e., if the disc or the ring is not included in the electric circuit, it yields an RRE or an RDE, respectively, and if not an RRDE, where either the disc forms the cathode and the ring the anode, or the reverse. [Pg.203]

Fig. 3. Pulsed discharge radical source with two ring electrodes and pulsed high voltage. Fig. 3. Pulsed discharge radical source with two ring electrodes and pulsed high voltage.
Rao et al. (R7) first made local mass-transfer measurements, by ring electrodes embedded in the perforated plates between which a packed bed was contained. They measured the local mass-transfer rate at ring electrodes... [Pg.276]

The AC data of Hillman and co-workers (Li et al., 1992) showed a marked dependence on both geometry and convection effects. By using a thin ring electrode of thickness 0,025 cm and diameter 0,8 cm, results showing both simple Warburg behaviour and, in rotation, the underlying slow surface kinetics can be obtained. [Pg.169]


See other pages where Ring electrodes is mentioned: [Pg.811]    [Pg.1346]    [Pg.1936]    [Pg.1936]    [Pg.541]    [Pg.74]    [Pg.1005]    [Pg.1007]    [Pg.1123]    [Pg.1123]    [Pg.113]    [Pg.67]    [Pg.276]    [Pg.377]    [Pg.648]    [Pg.651]    [Pg.113]    [Pg.339]    [Pg.992]    [Pg.58]    [Pg.378]    [Pg.393]    [Pg.470]    [Pg.172]    [Pg.195]    [Pg.197]    [Pg.197]    [Pg.197]    [Pg.274]    [Pg.275]    [Pg.275]    [Pg.293]    [Pg.301]    [Pg.304]    [Pg.304]    [Pg.34]    [Pg.171]    [Pg.185]   
See also in sourсe #XX -- [ Pg.130 ]

See also in sourсe #XX -- [ Pg.7 , Pg.191 , Pg.258 , Pg.259 , Pg.260 , Pg.261 , Pg.262 , Pg.263 , Pg.264 , Pg.270 , Pg.271 , Pg.275 , Pg.339 , Pg.345 , Pg.348 , Pg.350 , Pg.371 , Pg.374 ]

See also in sourсe #XX -- [ Pg.140 , Pg.275 , Pg.276 , Pg.277 , Pg.287 , Pg.289 , Pg.304 , Pg.307 , Pg.318 , Pg.321 ]




SEARCH



Adsorption rotating ring—disc electrode

Aromatic rings, mercury electrode

Carbon ring electrode

Carbon ring electrode characterization

Carbon ring electrode fabrication

Carbon ring electrode ultrasmall

Collection efficiency, rotating ring-disk electrodes

Collection rotating ring-disc electrode

Concentric ring electrodes

Electrode cells concentric ring

Electrode potentials, ring

Electrode ring micro

Electrode rotated ring-disk

Electrodes continued rotating disc-ring

Electrodes grounded ring

Electrodes multiple ring

Electrodes ring-shaped

Gold ring electrode

Kinetics rotating ring-disk electrode voltammetry

Pyrolytic graphite ring electrode

Reference electrodes Rotating ring-disk electrode

Ring electrode stacked

Ring electrode trap

Ring electrodes current densities

Ring electrodes current-potential curves

Ring electrodes during

Ring electrodes during pathway

Ring electrodes electrochemical reactions

Ring electrodes limiting current densities

Ring electrodes materials

Ring electrodes oxidant concentration

Ring electrodes reaction with

Ring-disc electrode

Ring-disk electrode

Ring-disk electrode construction

Ring-disk electrode voltammetry

Rotated ring-disc electrode

Rotating disc-ring electrodes

Rotating disk Ring Disc Electrode

Rotating disk electrode with a ring

Rotating double ring electrode

Rotating ring disk electrode method

Rotating ring disk electrode technique

Rotating ring electrode, hydrodynamic

Rotating ring-disc electrode collection efficiency

Rotating ring-disc electrode corrosion

Rotating ring-disc electrode oxygen reduction

Rotating ring-disc electrode technique

Rotating ring-disk electrode

Rotating ring-disk electrode RRDE)

Rotating ring-disk electrode catalytic reaction

Rotating ring-disk electrode current-potential curves

Rotating ring-disk electrode design

Rotating ring-disk electrode electrochemical

Rotating ring-disk electrode films

Rotating ring-disk electrode following reaction

Rotating ring-disk electrode steady-state

Rotating ring-disk electrode transients

Rotating ring-disk electrode voltammetry

Rotating ring-hemisphere electrode

Rotating split ring—disc electrode

Split ring disc electrode

The Rotating Ring-Disc Electrode (RRDE)

Wall-jet ring-disc electrode

© 2024 chempedia.info