21. Using the Bouguer - Lambert - Beer equation, determine the parameter "X" (in accordance with the task number) in the specified units (Table 2).
Detected ion or substance Ge4
Reaction of the formation of a colored compound with phenylfluorone GeR2
Wavelength, nm 510
ε 10000
Layer thickness, cm 5
Concentration x μg / ml
Optical density 0.084
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