Shabani Ali Mohammed Haji, Dadfarnia Shayessteh, Dehghani Zahra
Department of Chemistry, Yazd University, Safaieh, Yazd 89195-741, Iran.
Talanta. 2009 Sep 15;79(4):1066-70. doi: 10.1016/j.talanta.2009.02.008. Epub 2009 Feb 13.
An on-line solid phase extraction (SPE) preconcentration system coupled to flame atomic absorption spectrometer (FAAS) was developed for determination of copper and cadmium at microg L(-1) level. The method is based on the on-line retention of copper and cadmium on a microcolumn of alumina modified with sodium dodecyl sulfate (SDS) and 1,10-phenanthroline and subsequent elution with ethanol and determination by FAAS. The effect of chemical and flow variables that could affect the performance of the system was investigated. The relative standard deviation (n=6) at 20 microg L(-1) level for copper and cadmium were 1.4 and 2.2% and the corresponding limits of detection (based on 3 sigma) were 0.04 and 0.14 microg L(-1), respectively. The method was successfully applied to determination of copper and cadmium in human hair and water samples.
建立了一种在线固相萃取（SPE）预浓缩系统与火焰原子吸收光谱仪（FAAS）联用的方法，用于测定微克每升（μg L⁻¹）水平的铜和镉。该方法基于铜和镉在线保留在经十二烷基硫酸钠（SDS）和1,10 - 菲啰啉修饰的氧化铝微柱上，随后用乙醇洗脱并通过FAAS进行测定。研究了可能影响系统性能的化学和流量变量的影响。在20 μg L⁻¹水平下，铜和镉的相对标准偏差（n = 6）分别为1.4%和2.2%，相应的检测限（基于3σ）分别为0.04和0.14 μg L⁻¹。该方法成功应用于人体头发和水样中铜和镉的测定。
