METHOD FOR DETERMINING THORIUM-234 CONCENTRATION IN SEAWATER BOTTOM DEPOSITIONS Russian patent published in 2015 - IPC G01V5/06 G01N15/04 G21F9/12 

FIELD: ecology.

SUBSTANCE: invention refers to marine radioecology and biogeochemistry facilities. A method for determining the thorium-234 concentration in seawater bottom deposits consists in the fact that a radiochemical yield tracer is natural long half-life α-emitting isotope ²³²Th, initial activity of which is determined in the sub-sample with lead γ-emission -212 if the radioactive Th and Pb balance conditions are satisfied; another sub-sample taken by separating thorium from the respective elements by oxalate deposition, is used for liquid-scintiallation (LS) spectrometric analysis of ²³⁴Th and ²³²Th activities as shown by β- and α-emission; that is followed by calculating thorium radiochemical yield (R) and throrium-234 initial concentration (^234Thyield, Bq/kg) by presented formulas.

EFFECT: invention provides more effective and reliable determination of the ²³⁴Th content.