Abstract
The ion exchange method is generally applied to the analysis of radioactive strontium, 89Sr and 90Sr, in environmental samples because it can be easily handled. However, there are two problems to be solved in this method. One is that it generates a large amount of waste of ion exchange resin and organic solvent. The other is that it uses the organic solvent such as methanol which has a high environmental load. The present study demonstrated that the amount of ion exchange resin can be reduced by choosing the optimal size of ion exchange column depending on calcium content in environmental samples. It also demonstrated that ethanol can be used as organic solvent instead of methanol. Therefore, the risks on the environmental load and working condition can be lowered.
