| 黄星辉,宋焕文.挥发法测定土壤中钋-21[J].中华放射医学与防护杂志,1981,1(5):59-62 |
| 挥发法测定土壤中钋-21 |
| A NEW METHOD FOR DETERMINING POLONIUM-210 IN SOIL |
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| 中文摘要: |
| 本文描述了用挥发法测定土壤中210Po并分析了部分土壤样品,结果和浸取法相符。本方法操作较为简便易行,全程回收率高达97.4±2.6%,重现性较好。同时在银片自沉积分离前,先进行固-气相预分离,在500℃温度下,大部分核素和常量元素都留在样品中,经过挥发和银片自沉积两次纯水,提高了样品纯度。本方法适用于土壤、江河湖海沉积物中210Po的本底调查,以及210Po放射性污染的监测。 |
| 英文摘要: |
| The paper describes the method for determining 2tOpo in soil by volatilizafion.After being converted to chloride.Polonium in sample is volatilized by heating at 500°C in a simple volatilization apparatus and the vapourof polonium iscollected on glass fibre.Finally,210Po is separated by depositing it spontaneously on a silver disc.The experiments about the effects of volatilization temperature,time and etc.On the determination of 210Po have been carried out.The analyses of 210Po in soil showed that the results obtained by using volatilization method were consistent with that of the leaching methed. |
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