Operational Diagnostics, Estimation of the Scale of Damage and Aftermath Reduction of the Stressful Natural Processes - New Ecoinformatics Tools in Environmental Science: Applications and Decision-making - page 752

Fig. 9.16 Functional scheme of 8-channel spectrophotometer. Results of measurements are given
by the scale of analogue-digital transformer in range from 0 to 2 12 . Light signal is transformed in
electrical signal in range from − 5 V to +5 V and after that it is expressed as digital code in the

interval [0, 4096]

The obtained results from the experimental hydrophysical investigations in
South Vietnam using spectrophotometric measurements are characterized by the
following parameters:

Risks of the missing critical concentration of the chemical elements in water
solution are varied from 0.12 to 0.31.

￿

￿ Risks of the missing critical concentration of the oil products in water solution

are varied from 0.09 to 0.22.

￿ Risks of the missing critical concentration of the biogenic salts in water solution

are varied from 0.16 to 0.39.

These risks depend on the forms of spectral images and on the number of
spectral channels. These risks are smaller for measurements obtained from the
spectroellipsometer. That is why decrease of these risks can be achieved by means
of coupled use of different devices and data processing methods. According to