Double-beam atomic absorption spectrometers

Figure 2.2 Diagram of a double beam atomic absorption spectrometer.

Figure 11.1 (a) Optics Perkin-Elmer Model 2280 single beam atomic absorption spectrometer (b) Optics Perkin-Elmer Model 2380 double beam atomic absorption spectrometer... 

The design of a conventional atomic absorption spectrometer is relatively simple (Fig. 3.1), consisting of a lamp, a beam chopper, a burner, a grating monochromator, and a photomultiplier detector. The design of each of these is briefly considered. The figure shows both single and double beam operation, as explained below. 

Figure 3 Principle of construction of atomic absorption spectrometers. (A) Single-beam spectrometer with electrically modulated lamp radiation (B) double-beam spectrometer with reflection and splitting of the primary radiation by a rotating, partially mirrored quartz disk (chopper). 1 - radiation source, 2 -sample cell (atomizer), 3 - monochromator, 4 - detector, 5 -electronics and readout (by permission of Wiley-VCH from Welz B and Sperling M (1999) Atomic Absorption Spectrometry, 3rd, completely revised edition. Weinheim Wiley-VCH).

Figure 1.6 Configurations of instruments for atomic absorption spectrometry, (a) Single-beam spectrometer (b) double-beam spectrometer.

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