Hi, any help would be greatly appreciated as I have no idea how to begin, the answer is meant to be 1.27 mg mL-1.
The concentration of iron in a blood sample was determined by
flame atomic absorption spectrophotometry as follows: 2 mL of blood was
extracted with 20 mL of methanol and filtered. 1 mL of the extract was diluted to
20 mL with methanol and aspirated onto the flame. The absorbance was 0.115
(arbitrary units). A 10 mg/L standard iron solution yielded a signal of 0.180 under
the same conditions. Calculate the quantity of iron in the sample in mg mL-1