Separation of Tc(VII) from Tc(IV) by solvent extraction

Chemical Effects of I. T. 95mTc-95gTc in some Pertechnetates in Aqueous Solution

“…For the higher pH values, another carrier solution was used. It was prepared by the hydrolysis of (NH 4 ) 2 TcCl 6 in an acetate buffer solution (Carrier B) [7].…”

“…These carrier solutions were investigated by electrophoresis using a previously described procedure [7]. The sulphuric acid solution (Carrier A) at pH 0.1 contained only an uncharged species.…”

“…[7] and unpublished) has shown that in the absence of carriers, trace amounts of Tc(IV) species are liable to aerial oxidation, so that, as far as possible, an attempt was made to avoid such conditions. At both low and high pH, in the absence of carrier, more than 90% of the 95g Tc is found as The effect of pH on the yield of 95g Tc04 in KTc04 solution is shown in Figure 5.…”

Chemical Effects of the Isomeric Transition of 95mTc in a (NH4) 299TcCl6 Matrix

“…The extraction method allows the separation of TcO¡ from the previously hydrolysed TcCl= [15]. The solid (NH 4 ) 2 "(' 5m) TcCl 6 was dissolved in an acetate buffer solution at pH 6.…”

“…In this procedure the TcClJ is hydrolysed to yield Tc0 2 , while the TcO¡ extracts as an ion-pair species. Unless the TcCl¡" is hydrolysed it is also partly extracted by the alcohol (15 ]. The electrophoretic experiments have been performed with a Camag high voltage electrophoresis apparatus.…”