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称样0.5g,用氢氟酸和共他的酸分解。用 Alamine336(三辛酰叔胺)从酸性水溶液中萃取出大部份元素。用偶氮胂Ⅲ测定水相中的钍。低至4ppm 的浓度还能测定。每人每天工作八小时,可以分析100个样品。
Weigh 0.5g, with hydrofluoric acid and co-his acid decomposition. Most of the elements were extracted from the acidic aqueous solution with Alamine 336 (tertiary octanoyl tertiary amine). Determination of thorium in aqueous phase with arsenazo III. Concentrations as low as 4 ppm can be measured. Eight hours per person per day, can analyze 100 samples.