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报道了微晶萘负载 1 -苯基 -3-甲基 -4 -苯甲酰基 -5-吡唑酮 ( PMBP)微型柱分离预富集与电热蒸发 -电感耦合等离子体原子发射光谱 ( ETV-ICP-AES)联用测定痕量稀土元素 ( Sc,Y,La和 Yb)的新方法 .试验了影响分离 /预富集待测物的各种因素 (包括溶液酸度、流速、试样体积、微柱尺寸 ) ;研究了吸附有待测物的微晶萘的溶解方法及共存元素对分离 /测定的影响 .在优化的实验条件下 ,方法的相对检出限为 1 4 pg/m L( Sc) ,32 pg/m L( Y) ,1 90 pg/m L( La)和 2 6pg/m L ( Yb) ,相对标准偏差 ( RSD)分别为 3.1 % ,3.5% ,4 .8%和 3.4 % ( n=9,c=1 0 ng/m L) .本法已成功地应用于生物样品中痕量稀土元素 ( Sc,Y,La和 Yb)的测定 ,结果满意 .
Reported the separation and preconcentration of microcrystalline naphthalene loaded 1 - phenyl - 3 - methyl - 4 - benzoyl - 5 - pyrazolone (PMBP) column and electrothermal evaporation - inductively coupled plasma atomic emission spectrometry (ETV- (Sc, Y, La, and Yb) by ICP-AES in combination with various factors affecting the separation / preconcentration of analytes, including solution acidity, flow rate, sample volume, And the effect of coexisting elements on the separation / determination of microcrystalline naphthalene was studied.Under the optimized experimental conditions, the relative detection limit of the method was 14 pg / m L ( The relative standard deviations (RSDs) were 31%, 3.5%, 4.8% and 32.8%, respectively. The relative standard deviations (RSDs) were 32 pg / m L (Y), 190 pg / m L (La) and 26 pg / m L 3.4% (n = 9, c = 10 ng / m L). This method has been successfully applied to the determination of trace rare earth elements (Sc, Y, La and Yb) in biological samples with satisfactory results.