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Factors affecting the electrodeposition of226Ra
Authors:N E Whitehead  R G Ditchburn  W J McCabe  R Van Der Raaij
Institution:(1) Nuclear Sciences Group, Physical Sciences Division, D. S. I. R., P. O. Box 31-312, Lower Hutt, (New Zealand)
Abstract:The electrodeposition of226Ra for agr-spectrometry was reinvestigated to improve reproducibility and yield. Electrodeposition is from 20 ml of 90% propan-2-ol10% 0.05M HNO3 onto stainless steel disks, using 100 mA at 35 V for 20 minutes and a platinum anode. Half deposition time is 3–4 minutes. The following factors were found important: 1. Maintaining the same anode position. 2. Rotation of cathode. 3. Exclusion of sulphate. 4. Avoiding heating the HNO3/propan-2-ol plating solution. 5. Exclusion of solubilised resin resulting from passage through ion-exchange columns. 6. Maintaining other impurities at less than 10 mgrg. If these precautions are followed yields are greater than 90%.
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