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将噻吩甲酰三氟丙酮—氧化三正辛基膦萃取体系应用于纸上荧光法同时测定钐和铕 ,试液用量少、操作简便快速。经处理的滤纸可使钐和铕的检出限分别达到 1.0和 0 .0 5ng。将方法应用于混合稀土氧化物中xng级的钐、0 .0xng级铕的同时测定 ,结果满意。
The method of simultaneous extraction of samarium and europium with fluorescence spectrophotometry was applied to the extraction of thiophenecarboxyltrifluoroacetone - tri-n-octylphosphine oxide. The test solution was less used and the operation was quick and easy. The treated filter paper allows the detection limits of samarium and europium to 1.0 and 0.05 ng, respectively. The method was applied to the simultaneous determination of xng grade samarium and 0 .0xng grade europium in mixed rare earth oxides with satisfactory results.