Improved optimum condition for recovery and measurement of 210Po in environmental samples
The aim of this study was to determine the optimum conditions for deposition of 210Po and evaluate the accuracy and precision of the results for its determination in environmental samples. To improve the technique for measurement of polonium-210(210Po) in environmental samples. The optimization of five factors (volume of media, acidity, removal of interference, temperature and deposition time) governing the deposition of 210Po onto silver discs were investigated. The optimum conditions for deposition of 210Po in the present study were achieved using plating solution of 80 mL hydrochloric acid (HCl) media at acidity of 0.5 M with the presence of 1.0 gram hydroxyl ammonium chloride and plating temperature of 90oC at 600 rpm for 4 hours. The recorded recoveries obtained using 209Po yield tracer in the CRM IAEA-360 and environmental samples were 85% - 98% showing that the efficiency of the new technique is a distinct improved method over existing ones. Therefore, optimization of 210Po recoveries from aqueous environmental samples can be achieved with accuracy and precision in a cost effective and time saving manner using the optimum conditions preferred in the present study.
Keywords: Polonium-210, spontaneous plating, optimum conditions, environmental samples