Activation analysis, applications

The most recent work on styrene [102] has been carried out in benzene solution with initiation by boron trifluoride etherate, BF3 0(C2H5)2. An accurate estimate of the number of active centres, [P ], was achieved by a method similar to that used in Saegusa et al. [45] in ring opening polymerizations (see Section 7.1). Reactions were prematurely terminated by addition of 2-bromothiophene, and the bromine content of the polymers produced estimated by radio activation analysis. Application of the simple relationship (which assumes rapid initiation)... 

Tjioe, P.S., de Goeij, J.J.M.,Houtman, J.P.W. (1977). Extended automated separation techniques in destructive neutron activation analysis application to various biological materials, including human tissues and blood, J. Radioanal. Chem., 35, 511-522. 

Each experimenter involved in the use of activation analysis has created particular techniques that he considers practical to his use of the method. The publications cited herein give specifics about each of these efforts. Other writers, however, emphasize special situations that are inherent to any activation analysis application. For example. Gibbons (317) has reported on the possible errors to be encountered in activation analysis applications, while Mesler (611) has provided potential users of... 

Either precipitation, solvent extraction, ion exchange, electrodeposition or volatilization, or a combination of these, are the techniques usually employed if chemistry is used in an activation analysis application. The Nuclear Science Series of the Subcommittee on Radiochemistry, National Academy of Sciences-National Research Ck)uncil (924) records many of the radiochemical separation methods used in activation analysis. The NAS-NRC Monograph, NAS-NRC-1351, (642) also provides useful information on radiochemistry and its applications. 

A. ACTIVATION ANALYSIS APPLICATIONS TO DETERMINE TRACE ELEMENT CONCENTRATIONS IN PLANTS... 

Investigations of trace elements or trace contaminants in agricultural materials and products have been ably assisted by activation analysis applications. Much of this interest has come about because of the discovery that trace amounts of selenium had an essential function in mammals. The works of Guinn (335), Hadjimarkos (370), and McConnell (597) gave information about the selenium content of cereal diets. Bowen and Cawse (120) used it to determine Se in fertilizers and plant materials, while Duftschmid and Leibetseder (242) investigated the relationship between Vitamin E deficiencies and the selenium content of animal organs by an activation analysis method. 

Stover, T. and Lamaze, G. (2005). Compton suppression for neutron activation analysis applications at the National Institute of Standards and Technology (NIST), Nucl. Instr. Meth. Phys. Res., B, 241, 223-227. 

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