Department of Chemistry, P.O. Box 25000, University of Central Florida, Orlando, FL 32816-2366, USA.
Talanta. 2010 Nov 15;83(1):233-40. doi: 10.1016/j.talanta.2010.09.013. Epub 2010 Sep 16.
The strong affinity between polycyclic aromatic hydrocarbons (PAH) and the surface of gold colloids is investigated to device an extraction method for water samples. Within the 20-100 nm particle diameter range, the 20 nm gold nanoparticles showed the best extraction efficiencies for all the studied analytes. The new approach is combined to laser-excited time-resolved Shpol'skii spectrometry for the direct analysis of benzo[a]pyrene in drinking water samples. For a 500 μL sample volume, the analytical figures of merit demonstrate precise and accurate analysis at the parts-per-trillion level. The extraction efficiencies are statistically equivalent to 100% with relative standard deviations lower than 2%. The average recoveries were varied from 87.5% to 96.5% for different concentration of analytes. The simplicity of the experimental procedure, the low analysis cost, and the excellent analytical figures of merit demonstrate the potential of this approach for routine analysis of drinking water samples.
研究了多环芳烃（PAH）与金胶体表面之间的强亲和力，以开发一种用于水样的萃取方法。在 20-100nm 粒径范围内，20nm 金纳米粒子对所有研究的分析物表现出最佳的萃取效率。该新方法与激光激发时间分辨光谱法相结合，可直接分析饮用水样品中的苯并[a]芘。对于 500μL 样品体积，分析的衡量标准表明在痕量水平上进行精确和准确的分析。萃取效率的统计结果为 100%，相对标准偏差低于 2%。对于不同浓度的分析物，平均回收率在 87.5%到 96.5%之间变化。实验程序简单，分析成本低，分析的衡量标准优异，证明了该方法在常规分析饮用水样品方面的潜力。
