METHOD OF DETERMINING POSITION OF IMPURITIES OF NITRATE COMPOUNDS IN HYDROXYAPATITE Russian patent published in 2015 - IPC G01N24/10 

FIELD: chemistry.

SUBSTANCE: method includes irradiating a hydroxyapatite sample with X-ray, gamma-radiation or electron beams, followed by recording, using an EPR technique, the resultant paramagnetic centres on a certified EPR spectrometer; calculating spectral characteristics of the observed EPR spectrum (number of observed lines and position thereof) while monitoring the measurement error and comparing the obtained spectral characteristics with spectral characteristics of nitrogen radicals; carrying out additional comparison of previously obtained spectral characteristics with spectral characteristics of nitrogen radicals in different positions substituting OH and(or) PO4 functional groups in the hydroxyapatite structure, particularly while allowing the determination of the point(s) of incorporation(substitution) of impurities of nitrogen compounds in the hydroxyapatite structure.

EFFECT: enabling determination of positions of impurities of nitrogen compounds in hydroxyapatites.

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