Abstract: STUDY ON THE APPLICATION OF CROWN ETHER FOR NEUTRON ACTIVATION ANALYSIS OF RUBIDIUM AND RHENIUM IN ROCK SAMPLESWang Xiaolin;Fu Yibei;Liu Yinong;Xiong Zonghua;Hao Fanhua(Insitute of Nuclear physics and Chemistry,China Academy of Engineering Physics,P.O.Box 525(75),Chengdu,610003)Abstract:The extraction behaviour of rubidium and rhenium with 18-crown6-(18C6)and benzo-15-crown-5(B15C5)in nitrobenzene from picric acid or potassium hydroxide solution are studied and methods for separation and determination are developed.The molar ratio of 18C6 to Rb and B15C5 to Re in the extracted species is probably 2:1.Rubidium and rhenium in rock samples are satisfactorily determined by neutron activation method.Keywords:Crown ether Extraction Neutron activation analysis Rubidium Rhenium Rock