The spreadsheet lists molar absorptivities of three dyes and the absorbance of a mixture of the dyes

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The spreadsheet lists molar absorptivities of three dyes and the absorbance of a mixture of the dyes at visible wavelengths.

Use the least-squares procedure in Figure 18-3 to find the concentration of each dye in the mixture.

A Mixture of Dyes B 1 Absorbance 3 Wavelength (nm) Molar Absorptivity Sunset Yellow Ponceau 4R of mixture 4 Tartrazine Am 350 6.229E+03 2.019E+03 4.172E+03 0.557 6 375 1.324E+04 4.474E+03 2.313E+03 0.853 7 400 2.144E+04 7.403E+03 3.310E+03 1.332 8. 425 2.514E+04 8.551E+03 4.534E+03 1.603 9. 450 2.200E+04 1.275E+04 6.575E+03 1.792


Figure 18-3

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