METHOD OF PHOTOMETRIC DETERMINATION OF RHENIUM (VII) Russian patent published in 2008 - IPC G01N21/78 

FIELD: chemistry.

SUBSTANCE: method includes preparation of rhenium (VII) solution, its reduction with SnCl₂ solution to rhenium (IV), converting into complex compound and measuring coefficient of diffuse reflection on silica surface. Complex-forming agent sorbent - silica, chemically modified with mercaptopropyl groups, is used, and coefficient of diffuse reflection of rhenium (IV) complex at 410 nm is measured.

EFFECT: addition of chemically modified silica to analysed solution in order to concentrate rhenium allows to reduce limit of detecting, reduce temperature of analysed solution and preserve analysis duration.