Question

A method for the analysis of the drug diazepam in blood consistently produces results that are low by -5.4%. If the measured concentration of diazepam in a patient’s blood sample is 2.02 ppm, what must be the actual concentration in their blood (in ppm)?
E = experimental
A = actual
------------
[(E-A)/A] = -0.054
[(2.02-A)/A] = -0.054
Solve for A

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