微柱富集-石墨炉原子吸收光谱法测定痕量钼
Micro Column Preconcentration-GFAAS Determination of Trace Amounts of Molybdenum
摘 要
提出和制备了一种负载苯基荧光酮(PF)的滤纸纤维柱,用于石墨炉原子吸收光谱法测定痕量钼的预富集.试验表明:在pH 2.0时,控制待测液流速在2.0 mL·min-1以内,可定量富集钼(Ⅵ),饱和吸附量为25.2 μg·g-1.用流速1.0 mL·min-1的氨水(3+97) 2.0 mL,可将5.0 μg钼(Ⅵ)从吸附柱上定量洗脱.对国家地质标准物质GSS5和GSR1的分析结果表明,该方法可靠.测定了人工合成锌样、铜精矿中痕量钼,方法的检出限为1.01 μg·L-1,回收率为92.0%~103.0%.
微型柱
富集
石墨炉原子吸收光谱法
苯基荧光酮
Molybdenum(Ⅵ)
Micro column preconcentration
Preconcentration
GFAAS
Phenylfluoreone
Abstract
A micro column packed with phenylfluorone coated fiber of filter paper was prepared. Mo(Ⅵ) can be quantitatively adsorbed on the micro column at pH 2.0 with flow rate of 2.0 mL·min-1 and eluted from the column with 2.0 mL of aqueous ammonia (3+97) at flow rate of 1.0 mL·min-1. Amount of saturated adsorption of Mo(Ⅵ) on the column was 25.2 μg·g-1. Accuracy of the method has been verified via the analysis of the standard reference materials GSS 5 and GSR 1. Detection limit of the method was 1.01 μg·L-1 and recovery was in range of 92.0%-103.0%. The method has been applied to the determination of traces of molybdenum in simulated samples of Zn and copper concentrates.
中图分类号 O657.31
所属栏目 工作简报
基金项目
收稿日期 2007/4/18
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备注欧阳开(1981-),女,广西玉林人,硕士研究生,主要从事稀有金属的分离富集测定研究工作.
引用该论文: OU Yang-kai,GONG Qi,LI Xing-yang. Micro Column Preconcentration-GFAAS Determination of Trace Amounts of Molybdenum[J]. Physical Testing and Chemical Analysis part B:Chemical Analysis, 2008, 44(9): 885～887
欧阳开,龚琦,李兴扬. 微柱富集-石墨炉原子吸收光谱法测定痕量钼[J]. 理化检验－化学分册, 2008, 44(9): 885～887
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