The spreadsheet lists molar absorptivities of three dyes and the absorbance of a mixture of the dyes
Question:
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.
Figure 18-3
Transcribed Image Text:
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 10 475 1.055E+04 1.940E+04 1.229E+04 2.006 11 500 1.403E+03 1.869E+04 1.673E+04 1.821 12 525 0.000E+00 7.641E+03 1.528E+04 1.155 13 550 0.000E+00 3.959E+02 9.522E+03 0.445 14 575 0.000E+00 0.000E+00 1.814E+03 0.084
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