41(1). To select the conditions for the analysis of water-methanol mixtures, the absorption at 1.44 and 1.94 μm of four solutions was measured:
w(H2O). % 26.0 29.0 32.0 34.0
A1.44 0.130 0.145 0.0180 0.080
А1.94 0.470 0.500 0.538 0.560
Based on these data, select the analytical band λx for analyzing the methanol-water mixture and determine the mass fraction (%) of water and methanol in the analyzed samples using the following data: 1) Aλx=0.570 2) Aλx=0.540 3) Aλx=0.455
Solution for option number 1.

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