RADIOACTIV.\TION ANALYSIS 



425 



twice, and ali(|U()ts of the solutions put on Do\vex-50 columns, one oper- 

 ated at pH 3. 20 and one at pH 3.43, for separation of the other rare 

 earths. Identification was accomplished by use of known standards of 

 high-purity rare earths. Table 10-7 sho\\s typical analytical results on 

 bone. 



MISCELLANEOUS APPLICATIONS 



Some illustrative results, primarily in the field of inorganic chemistry, 

 are presented in Table 10-8. 



A possibility that has not as yet been exploited in the biological field 

 is the use of autoradiography following irradiation of the sample. This 

 technique should provide the advantage of visualization of the localiza- 

 tion of elements in heterogeneous samples. Yagoda (23) has summarized 

 some of the work that has been done along these lines with metals and 

 minerals. 



Table 10-8. Typical Results of Radioactivation Analyses 



GENERAL REFERENCES 



1. Boyd, G. E.: Method of Activation Analysis, Anal. Chein., 21: 335-347 (1949). 



2. Taylor, T. I., and \V. W. Havens, Jr.: Neutron Spectroscopy for Chemical 

 Analysis, III, Nucleonics, 6: 54-66 (1950). 



3. Muehlhause, C. O., and G. E. Thomas: Use of the Pile for Chemical .Analysis, 

 Nucleonics, 7: 9-17/59 (1950). 



4. Leddicotte, G. W., and S. A. Reynolds: Activation Analysis with the Oak Ridge 

 Reactor, Nucleonics, 8: 62-65 (1951). 



