β Scribed by R.G. Deshpande
No coin nor oath required. For personal study only.
potassium chloride 9 (half-life SS days) is wiclely used as a tracer in agricultural and biochemical studies.
It is generally obtained in the carrier-free state by the Wl (yt, $)3% reaction using KC1 as the target material. 35 thus produced'is radiochemically contaminated with 32J? (formed by the %l(n, a)32P reaction), from which it must be separated, A number of methods have been reported by different authors19293 for the separation of 3% from various targets, viz. Ccl,, KCl, NaCl, F&l, etc. In the conventional method*, followed in many countries, the pile-irradiated KC1 is dissolved in water and the solution passed down a cation-exchange column; I<+ ions are adsorbed on the column while 3Kl? and 38S pass out with the effluent solution as phosphate and sulphate ions. 32P is then removed either by coprecipitation with La(OH),, or by passage through a column containing aluminium shavings.
This paper describes a new method for the separation of 36S from pile-irradiated KC1 in which the separation of carrier-free 3% has been much simplified through the use of an anion-eschange column. The separation of 35S from 32P and I<+ is effected in a single step and 3% is obtained in a radiochemically pure form. The method has been tried with success for the isolation of millicurie amounts of 3% and is being adopted for the routine production of this isotope at the Trombay Establishment.
π SIMILAR VOLUMES
Equations to calculate the duration of electrochemical chloride 8! extraction have been proposed and solved for the case of a constant z chloride concentration in the concrete or for a concentration following the error function trend. In the case of constant initial chloride content, both potentiost