By G W Leddicotte; U.S. Atomic Energy Commission.; National Research Council (U.S.). Committee on Nuclear Science. Subcommittee on Radiochemistry

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HC1, dilute to volume, mix well (watch radiation dose). 00 ml standardized Mn carrier plus about 1 ml each Cu++, Ni++, and Na+ holdback carriers. Mlute to 20 ml with ~0, *, make alkaline with ~OH and oontinue as in part c. B. 00 ml standtized Mn carrier and abc=ut1 ml each Cu++, Ni++, and Na+ holdback. add ta tinsolve eample, heating If neoeesary. 47 DILut@ to 20 ml, make basio witi NEhOH, and oontinue as in part C. 00 ml. standardizedMn aarrier and about 1 ml each Cu++, Nl++, and Na+ holdback, tite b 20 ml, make baaic with NE40H, ad c.

Can usually be seen without chemical aepamtlon on moat neutron irradiatedrocks and muoh biologicalmaterial. A major titerference ie often sodium (15 hr. 2ka) and a eingle p-ipitation til of fi02 fi”m a titric”acid eolufion PIUEI~ro3 or K~03 usually be adequate to rmove Na and some other titerfSrences. Lithium drifted genuatuiumgamma spectra,because of the exoellent energy revolution, lend themselvesto computer prooesstngand analysis of the data. Even though germanium dstectom have very high resolution,it is essentialto oheck that there are no titsrfe-g g- rays, especi~ if ~~utsr da- procees~g is behg used.

A number of g~etrlc be determined msthode have becm developedbut are eeldcenwed because other methde am much faster and less eubjact to interference. The gmvlmetric methods make use of the prealpltationof manganerneas MnNHbPOb”~O, M@ 8nd MI102ad ignition to ~p207, -b, or w3~; m of these precipitatiaamethods have been usIedin radioohmical separations. 6. anbe accmpllehed by acid attaak followedby lCISObor Ny003 fusionof the insoluble residme. The dissolutionof Nn02 10 greatly faci~tated by the addition of a reducbg agent such ae ~02 or S02.

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