Extraction of pertechnetate with triphenyltin chloride and trioctyltin chloride

The extraction of pertechnetate in the form of ionogene associates with triphenyltin and trioctyltin cations into chloroform, benzene, toluene and nitrobenzene was studied. As aqueous phases solutions of 99mTcO4- in deionized water and diluted solutions of NaCl, HCl, NaNO3, HNO3, NaClO4, HClO4 and NaOH were used. What concerns organic phases, at the use of triphenyltin chloride the extractability of pertechnetate increases in the sequence: toluene << chloroform, benzene < nitrobenzene and approximately in the sequence: NaOH, NaCl, HCl < NaNO3 < H2O < NaClO4 concerning aqueous phases. For trioctyltin chloride in chloroform the extractability of TcO4-increases approximately in the sequence of aqueous phases: NaOH < HCl, NaNO3, NaClO4, NaCl << H2O and in nitrobenzene in the sequence NaOH < NaClO4 < HCl < NaNO3, NaNO3, NaCl << H2O. The extractability for trioctyltin chloride is in general slightly lower as compared with triphenyltin chloride. The results of the extraction are presented in the form of graphical plots of technetium distribution ration ((DTc, log DTc) or extraction yield (ETc, %) against concentration of the investigated component in aqueous or organic phase. In some of the studied systems practically quantitative extraction of pertechnetate into organic phase has been achieved. (authors)