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本文报道以DCS-偶氮胂固定于活性炭上作为固定相,用于流动注射微柱预富集体系和等离子体原子发射光谱测定痕量稀土元素.测定了吸附材料对稀土元素的静态和动态吸附容量,分别达几十和几个mg/g吸附材料;对影响柱预富集的PH、上柱速度、洗脱酸度、柱尺寸等因素进行了详细考察;在优化条件下,富集倍数为10倍左右.对La、Nd、Eu、Gd、Tb、Dy、Ho和 Lu等元素的检出限为 μg/L级,RSD在 1.5％～3.9％之间(n=6,单一稀土浓度0.085 mg/L).该法应用于高纯锌中痕量稀土元素的测定,试样加入回收率在 84.5％～97.6％之间,分析结果满意.
In this paper, DCS-arsenazo immobilized on activated carbon as a stationary phase for the flow injection micro-column pre-enrichment system and the determination of trace rare earth elements by plasma atomic emission spectrometry was measured static and dynamic adsorption of rare earth elements Capacity, respectively, up to dozens and several mg / g adsorbent material; influencing the pre-enrichment of the column PH, the column speed, elution acidity, column size and other factors were investigated in detail; under the optimized conditions, the enrichment factor The detection limit of elements such as La, Nd, Eu, Gd, Tb, Dy, Ho and Lu is μg / L and the RSD is between 1.5% and 3.9% (n = 6 and the single rare earth concentration is 0.085 mg / L) .The method was applied to the determination of trace rare earth elements in high-purity zinc, the recovery rate of samples was between 84.5% ~ 97.6%, and the results were satisfactory.