METHOD OF DETERMINING METAL IONS IN SOLUTION Russian patent published in 2012 - IPC G01N21/65 

FIELD: chemistry.

SUBSTANCE: method involves use of Raman spectroscopy and active substrates which realise the gigantic Raman scattering effect for amplifying an optical signal from a complex of metal ions with an organic dye, wherein solutions, scrapings or wash-offs from solid surfaces are used to prepare the solution for analysis. A complexing organic dye is added to that solution, and several minutes after formation of a complex, a solid-state active substrate is placed into the solution. The time for adsorption of the analyte onto the surface of the material which amplifies the Raman scattering signal is equal to 1.5-2 hours. A dried sample is put into the measuring compartment of a Raman spectrometer. A Raman spectrum is obtained and then analysed for presence of lines associated with oscillations of the complex of metal ions with the organic dye.

EFFECT: invention increases sensitivity of determination and widens the range of methods of detecting and monitoring content of different metals in solutions.

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