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用射气法测定岩石,矿物及其他天然物质中的镭及其同位素时,必须将试样转变成溶液。通常,将试样与苏打,苛性碱和氯化钡的混合物共熔使试样转变成为溶液[1,2]。这是个繁杂的方法,在必须称取大量试样(10-20克)和试样中含有大量硅酸(50-70％)的情况下更为复杂。因此,为了简化分析步骤,必需为试样转成溶液寻找新的途径。为此我们利用HF与硅酸作用时硅酸挥发的性质。由于使用氢氟酸有许多不便(尤其是在处理大量样品时),所以我们用氟
When the radium method is used for the determination of radium and its isotopes in rocks, minerals and other natural substances, the sample must be converted into a solution. Typically, a sample is mixed with soda, caustic, and barium chloride to melt the sample into solution [1,2]. This is an intricate method that is more complicated where a large amount of sample (10-20 grams) must be weighed and the sample contains a significant amount of silicic acid (50-70%). Therefore, in order to simplify the analysis step, it is necessary to find a new way for the sample to turn into a solution. To this end, we use the nature of silicic acid volatilization when HF and silicic acid are used. Due to the many inconveniences associated with the use of hydrofluoric acid (especially when handling large volumes of samples), we use fluorine