90. Solving a chemistry problem

90. Solving a chemistry problem

Determine the zinc content of brass from the following AES data
Parameter Reference 1 2 3 Analyzed sample
С, % (Zn) 1.10 1.32 1.49 X
S(Zn) 0.90 0.12 1.32 1.02
S(Cu) 0.85 0.87 0.86 0.85

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