Cyclic instrumental neutron activation analysis

CINAA cyclic instrumental neutron activation analysis... 

In the course of determinations of trace element concentrations in nails of a group of carpenters by cyclic instrumental neutron activation analysis (CINAA) using the PCA (principal component analysis256-259) method, the silver concentration in nails was determined260 to be 0.027 0.037 pgg-1. The mean concentration of gold was 0.010 pgg-1. Nails can be used as a dietary and environmental exposure monitor261-267. 

GINAA Cyclic instrumental neutron activation analysis is used to determine very short lived isotopes. The sample is irradiated for a short time, rapidly transferred to a detector for counting the entire process repeated for a number of cycles with the gamma-ray spectrum recorded from each cycle accumulated to yield a cumulative spectrum. 

Elson, C.M., Ackman, R.G. and Chatt, A. (1983) Determination of selenium, arsenic, iodine and bromine in fish, plant and mammalian oils by cyclic instrumental neutron activation analysis. J. Am. Oil Chem. Soc. 60, 829-832. 

Instrumental Neutron Activation Analysis (INAA) was applied to the determination of the platinum metals as part of a study of their uptake, accumulation and toxicity in plants. Long irradiations are described for iridium, osmium and ruthenium determinations in specially grown plant materials. An interference in the determination of platinum in plant matrices by this method is reported also. Short irradiations, utilising thermal and epithermal fluxes are investigated for rhodium and palladium determinations, with further studies using cyclic activation analysis. 

The nondestructive instrumental (INAA) and destructive radiochemical (radiochemical neutron activation analysis — RNAA) procedures of this method are discussed later in this chapter. Specific problems, such as chain decays, cyclic activation, and interferences, as well as typical appKcations have recently been discussed by Alfassi (2001) and the references therein. 

---