摘要： 研究负载苯基荧光酮(PF)滤纸纤维柱预富集痕量铟，确立了制备负载苯基荧光酮纤维的最佳条件，对铟的富集、洗脱和测量条件进行了优化。含In待富集液在pH 5时，以2.0 mL·min-1的速率过柱，用8 mL 5.00 mol·L-1的HNO3以1.0 mL·min-1的速率可以完全洗脱。用涂钨普通石墨管GFAAS测量In，选Ag作基体改进剂，提高了灵敏度。该方法检出限为0.32 ng·mL-1,回收率为95.0%～101%，RSD 1.8％～7.0％，测定自来水样品和人工合成锌、铝等样品的In，得到满意的结果。
关键词：苯基荧光酮;负载纤维;富集;石墨炉原子吸收;铟
Abstract：The filter fiber column coated with phenyl fluorone was extended to pre-concentrate trace amount of indium determined by GFAAS. The optimized condition for filter fiber coated with phenyl fluorone was obtained. The enrichment condition was achieved when the pregnant solution at pH 5 flowed through the filter fiber column at the rate of less than 2.0 mL·min-1,then 8mL HNO3 of 5.00 mol·L-1 was used as an eluent. With a general graphite tube coated with tungsten and silver as matrix modifier, the sensitivity was enhanced with GFAAS. The method was validated by the determination of trace indium in water, artificial zinc, and aluminium samples. The detection limit of the method was 0.32 ng·mL-1,the recovery was in the range of 95.0%-101%, and the RSD was between 1.8% and 7.0％.
李兴扬,韦小玲,龚琦*. 负载苯基荧光酮纤维柱富集-GFAAS测定痕量铟[J]. 光谱学与光谱分析, 2007, 27(06): 1225-1228.
LI Xing-yang,WEI Xiao-ling,GONG Qi*. Filter Coated with Phenyl Fluorone for Enrichment and Determination of Indium by GFAAS . SPECTROSCOPY AND SPECTRAL ANALYSIS, 2007, 27(06): 1225-1228.
