A10. Solution to Chemistry Problem #11046

The following results were obtained for constructing a calibration graph for determining tin in bronze:
W(Sn),% 6.23 8.02 9.34 11.63
∆S 0.690 0.772 0.831 0.910
Photometry of the spectrum taken through a three-stage attenuator showed that for two steps of the Sn line ∆Sstep=1.055. When photometry of the spectrum of bronze samples photographed on another plate, for two steps of the same Sn line ∆Sstep was obtained (see above), and for the analytical pair Sn-Cu in the spectrum of the sample on the same plate Sx. Determine the mass fraction of tin in the samples:
Sample 1
∆S t 0.930
∆Sx 0.635