42. It has been established that the output signal of the IR analyzer at λ=1.68 µm is an additive function of the concentration of ammonia and ammonium carbonate, and at λ=2.19 µm – a function of the concentration of ammonia only, standard solutions of NH3 and (NH42)CO3 have the following optical density values:
Parameter Ammonia Ammonium carbonate
s, g/l 5.0 12.5 20.0 280 360 410
A2.19 0.150 0.330 0.510 - - -
A1.68 0.075 0.150 0.220 0.110 0.270 0.540
Determine the concentration (g/200 ml) of (NH4)2CO3 and NH3 in the solutions under study using the following data 1) A2.19=0.450 A1.68=0.380 2) A2.19=0.300 A1.68=0.380 3) A2.19= 0.210 A1.68=0.350
Solution for option number 1.

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