Spectrophotometry (3)

(2) The working principle of the spectrophotometer

1) 721 spectrophotometer

The continuous radiant light emitted by the light source is condensed by the condensing transmission mirror, irradiated on the flat reflector and turned 90°, and then enters the monochromator through the light entrance slit

Figure 3.

Figure 3.

2) Operation steps of 721 spectrophotometer

a.

b.

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e.

f.

g.

h.

3) 751 spectrophotometer

Model 751 spectrophotometer is equipped with two light sources, tungsten filament lamp is used when the wavelength is between 320~1000nm, and hydrogen arc lamp is used when the wavelength is between 200~320nm; there are also two types of phototubes, and Zimin photoelectric is used in the range of 200~650nm.

The above-mentioned spectrophotometers and other types of spectrophotometers need to read the instrument manual in detail and operate according to the manual
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