METHOD FOR DETERMINATION OF RADIONUCLIDES OF STRONTIUM IN NATURAL OBJECTS Russian patent published in 1996 - IPC

FIELD: analytic chemistry. SUBSTANCE: method is carried out by solid extraction with the help of sorbent. This process takes place in nitrate solution (its concentration being 0.1-0.5 M as calculated for nitric acid) for isolation the element to be determined from the sample. Mentioned above nitrate solution contains aqueous solution of sodium dodecyl sulfonate and alcohol solution of dicyclohexyl-18-crawn. Sorbent of 40-160 μm fraction on the base of silica gel being modified with nitrile groups (content of carbon and nitrogen in them being 4.55 and 1.35 %, respectively) is used for said extraction. EFFECT: improves efficiency of the method. 1 dwg