【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%。更多还原

【Abstract】 A micro column packed with phenylfluorone coated fiber of filter paper was prepared.Mo（Ⅳ）can be quantitatively adsorbed on the micro column at pH 2.0 with flow rate of 2.0 mL·min^-1and 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 25.2μg·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^-1and 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.更多还原