Fluorescence detector schematic diagram

A schematic diagram showing the disposition of these essential components for the different techniques is given in Fig. 21.3. The components included within the frame drawn in broken lines represent the apparatus required for flame emission spectroscopy. For atomic absorption spectroscopy and for atomic fluorescence spectroscopy there is the additional requirement of a resonance line source, In atomic absorption spectroscopy this source is placed in line with the detector, but in atomic fluorescence spectroscopy it is placed in a position at right angles to the detector as shown in the diagram. The essential components of the apparatus required for flame spectrophotometric techniques will be considered in detail in the following sections. 

Fig. 2. Schematic diagram of the apparatus. The superconducting magnetic coils create trapping potential that confines atoms near the focus of the 243 nm laser beam. The beam is focused to a 50 pm waist radius and retro-reflected to allow for Doppler-free excitation. After excitation, fluorescence is induced by an applied electric field. A small fraction of the 122 nm fluorescence photons are counted on a microchannel plate detector. Not shown is the trapping cell which surrounds the sample and is thermally anchored to a dilution refrigerator. The actual trap is longer and narrower than indicated in the diagram...

Figure 3-16 Schematic diagram of a fluorescence polarization analyzer. P is the polarizer to provide polarized excitation light. PA is the polarizer analyzer, which is rotated to provide the measurement of parallel and perpendicular polarized fluorescence-emission intensity. ExM is the excitation monochromator, EmM is the emission monochromator, D is the detector, and C is the reaction cell or cuvet.

Figure 4.12. (a) Schematic diagram of a fluorescence detector with dual monochromators and a square flow cell, (b) Schematic diagram of a refractive index detector. 

Figure 3.20 Schematic diagram of a multi-wavelength fluorescence detector.

Figure 9.3. Schematic diagram (top view) of the components of a fluorometer (filter fluorometer or spectrofluorometer). The source is a mercury-arc or xenon-arc lamp. The excitation grating or primary filter transmits only a portion of the radiation emitted by the source. Most of the exciting radiation passes through the sample cell without being absorbed. The radiation absorbed causes the sample to fluoresce in all directions, but only the emission that passes through the aperture or slit and through the secondary filter or fluorescence grating is measured by the phototube, or photomultiplier. The output of the detector is either measured on a meter or plotted on a recorder. From G. H. Schenk, Absorption of Light and Ultraviolet Radiation, Boston Allyn and Bacon, 1973, p 260, by permission of the publisher.

A schematic diagram of the liquid chromatography system and laser fluorescence detector Is shown in Figure 1. The key components of this analytical system are described sequentially In what follows ... 

Fig. 2 Schematic diagram of free jet apparatus showing the positions of the lasers and the fluorescence detector. On the right side of the diagram, the timing sequence is illustrated for the excimer and dye laser as well as for the integrator gate.

Figure 5. Schematic diagram of the UV and fluorescence amplifier and the electronic system for the conductivity detector.

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