Sequential ion exchange separation scheme for the identification of metallic radioelements

Neutron Activation Analysis of Aluminum. Determination of Gamma-Emitting Impurities with Long Half Lives.

“…Jervis and Mackintosh (11) used cation exchange chromatography with acidic solutions. Cation resins and complexing elutions could also be used to some extent (4).…”

Use of Chlorine for Quantitative Elution of Cu(II) from Dowex 1 Resins.

“…However, in spite of the claims of the manufacturer with regard to these properties, the possibility exists that there are traces of reducing groups on the resin which could account for the reduction of the Cu(II). Evidence exists in the literature that ion-exchange resins are not perfectly homogeneous and do possess some reducing power (1,2).…”

“…A minor problem with some detectors is the fact that the immediate pressure surge associated with valve switching extinguishes the flame. LITERATURE CITED (1) Undesirable side reactions between ions that are being eluted on an ion exchange column and the resin have been studied or referred to by several investigators (1,2). These reactions usually involve the reduction of cations or anionic oxidants, and may result in a decreased efficiency for the removal of the desired ion, a change in its elution characteristics, and interference by the reduced species with subsequent fractions.…”

Use of Chlorine in Cation Exchange Separations

“…Figure 1,5, is a record of a similar run, except that the tracer sample and resin were treated with chlorine under conditions described previously (4). No significant differences were noted whether the Fe(III) was allowed to stand in the column for only 1 hour or overnight before elution.…”

“…For separations on cation resins, chlorine appears to have advantages over other, stronger oxidants, like dichromate or permanganate. It is capable of oxidizing a good number of metals, resin-chlorine systems are fairly stable after proper pretreatment, and the small amounts of chloride formed by reduction of chlorine are usually tolerable in separation schemes (4) In spite of the apparent usefulness of chlorine, not much has been reported on the nature of the reaction between chlorine and sulfonic acid resins. Bauman, Skidmore, and Osmun (3) and later Braithwaite, D'Amico, and (4) McDonald, H. J., Lappe, R. J., Marbach, E. (7) Sato, T. R., Norris, W. P., Strain, .…”