FIELD: chemical analysis.
SUBSTANCE: there is initial mixture of a complex compound which contains (I) bonds, with one type of zinc isotope, and a sample in a solvent for obtaining a solution with subsequent registration of the mass spectrum of the solution. Then there is mixture of a complex compound which contains (III) bonds, with another type of zinc isotope, and the sample in a solvent for obtaining a solution with subsequent registration of the mass spectrum of the obtained solution. The molecular mass of the compound containing a monoester of phosphoric acid is determined, through comparison of the obtained mass spectra, where (I) bonds represent 
(I), and R1-R4 represent hydrogen or substitute atoms.
EFFECT: simplification of the process and making the device.
8 cl, 7 dwg
