molar mass (mg/mmol), and Ia is the signal integral of the acetone
used as internal standard. Ii is the integral of the signal in the 1H NMR
spectrum assigned to ni hydrogen atoms (mmol) in a particular group
of the component being quantified. The mass (mg) of each mixture
component was determined from multiplication of the component
molar mass by the respective value obtained from Eq. (1). In each case
the mass of minor impurities was established by the difference of the
mass sum of other components and the mixture total mass.