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

作　　者：欧阳开[1] 龚琦[1] 李兴扬[1] 

机构地区：[1]广西大学化学化工学院,南宁530004

出　　处：《理化检验（化学分册）》2008年第9期885-887,共3页Physical Testing and Chemical Analysis(Part B:Chemical Analysis)

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pH2.0时,控制待测液流速在2.0mL·min^(-1)以内,可定量富集钼(Ⅵ),饱和吸附量为25.2μg·g^(-1)。用流速1.0mL·min^(-1)的氨水(3+97)2.0mL,可将5.0μg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1.01μg·L^(-1),回收率为92.0%～103.0%。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 1.01μg · 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.

关 键 词：钼 微型柱 富集 石墨炉原子吸收光谱法 苯基荧光酮 

分 类 号：O657.31[理学—分析化学]