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The meconium (first stool) of newborns in an inner-city hospital is sometimes screened for the presence of drugs of abuse.

A standard addition curve was obtained for the analysis of a cocaine metabolite in a miconium sample in which the final volume was altered by the addition of each spike.

In a plot of [S]iVs/Vi versus [1.031]x+s,fVf/Vi, the slope and y-intercept were 1.031 mV/mM and 0.06 mV, respectively.

Calculate the concentration of the cocaine metabolite in the sample (2 s.f.) in mM.

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