纳米氧化铝微柱富集-等离子体发射光谱法测定植物中痕量稀土元素  

Separation/Preconcentration of Trace Rare Earth Elements by Micro-column Packed with Immobilized 1-Phenyl-3-methyl- 4- bonzoil-5-pyrazone on Nanometer Al 2O 3 and Their Determination by Inductively Coupled Plasma-Atomic Emission Spectrometry

作　　者：全光日[1] 普旭力[1] 江祖成[1] 胡斌[1] 

机构地区：[1]武汉大学化学系,武汉430072

出　　处：《分析化学》2005年第2期207-210,共4页Chinese Journal of Analytical Chemistry

摘　　要：以负载了1 苯基 3 甲基 4 苯甲酰基 吡唑酮[5](PMBP)的纳米氧化铝为微柱吸附材料,采用等离子 体原子发射光谱法(ICP AES),系统地研究了其在动态条件下对稀土离子Sc3+、Y3+和La3+的吸附性能,并确 定了最佳吸附及解脱条件。实验结果表明:在pH为4.5时,分析物均可被上述吸附材料定量吸附;用0.5 mol/L盐酸溶液可将吸附在微柱上的稀土离子完全解脱。本法对Sc3+、Y3+和La3+的检出限分别为0.16、 0.19和0.39μg/L;相对标准偏差(RSD)分别为2.7%、3.2%和1.6%(n=9,C=0.5mg/L)。方法应用于植 物标样中痕量Sc、Y和La的测定,其测定值与标样值吻合很好。Using a micro-column packed with immobilized 1-phenyl-3-methyl-4-bonzoil-5- pyrazone(PMBP) on nanometer Al2O3 powder as the adsorption material, the adsorption and elution behaviors of rare earth ions (Sc3+ Y3+ and La3+) on the above material under dynamic conditions were studied with inductively coupled plasma-atomic emission spectrometry. The conditions for preconcentration of rare earth ions were optimized, and the results show that the studied ions can be adsorbed quantitatively on the above material at pH = 4. 5 and the analytes adsorbed on the column can be eluted with 0.5 mol/L HCl solution. The detection limits of the method for Sc, Y and La were 0.16 mu g/L, 0.19 mu g/L and 0.39 mu g/L, respectively; and the relative standard deviation were 2.7%, 3.2% and 1.6%, respectively(n =9, C =0. 5 mg/L). The proposed method was applied to the determination of trace amount of Sc,Y and La in GBW 07605 Tea leaves and the determined values were in good agreement with the certified values.

关 键 词：微柱 痕量 稀土离子 LA^3+ 标样 PMBP 吡唑酮 吻合 测定值 等离子体发射光谱法 

分 类 号：O657.3[理学—分析化学]