摘要
以纳米氧化铝负载双硫腙为固相吸附剂，采用火焰原子吸收光谱仪（FAAS）作为检测手段，系统地研究了静态条件下纳米氧化铝负载双硫腙对贵金属离子（Au、Pd、Pt）的吸附性能，对影响待测离子吸附和解脱的主要因素进行了考察与优化，最后，将提出的方法应用于冶炼渣中Au、Pt、Pd的测定，方法检出限（S／N=3）分别为2、50、4μg／L，实际样品的加标回收率在92％～108％之间。该方法具有操作简单，测定快速，检出限低和吸附剂可重复使用等优点。
Based on the selective adsorption of the elements on dithizone on nano-alumina powder, a simple and rapid solid-phase extraction method has been developed for the separation and preconcentration of Au, Pt and Pd in geological samples for subsequent determination by flame atomic absorption spectrophotometry.Their adsorption capacities under stationary conditions were studied, and the effects of pH and temperature on adsorption rates and the eluant concentration were also studied and optimized. The proposed method has been successfully applied to the determination of Au, Pt and Pd in geological samples. The detection limits were 2, 50 and 4 μg/L for Au, Pt and Pd, respectively. Their recoveries and relative standard deviations were in the range of 92% - 108% and 2.3% -4.6% , respectively.
出处
《分析测试学报》
CAS
CSCD
北大核心
2006年第5期52-55,共4页
Journal of Instrumental Analysis
关键词
纳米氧化铝负载双硫腙
金
铂
钯
原子吸收光谱法
Dithizone-modified nano-alumina
Au
Pt
Pd
Atomic absorption spectrometry
