8. When analyzing an aluminum alloy for silicon using the single standard method, blackening (S) of the lines of a homologous pair was obtained in the spectra of the standard (SSi=1.09 and SAl=0.37 at CSi=0.95%) and the test sample (SSi=0 .86 and SAl=0.34). Determine the percentage of silicon in the aluminum alloy if ΔS=0 at S0Si = 0.45%.
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