Caballero-Díaz Encarnación, Valcárcel Miguel
Department of Analytical Chemistry, University of Córdoba, Córdoba, Spain.
J Sep Sci. 2014 Feb;37(4):434-9. doi: 10.1002/jssc.201301204. Epub 2014 Jan 21.
This paper deals with the ability of different types of carbon nanotubes to adsorb salicylic acid in river water samples. The use of these nanoparticles as a sorbent in a SPE procedure prior to CE analysis is essential for improving the enrichment factor and the recovery values. Several experimental variables were optimized in order to maximize the extraction efficiency. The proposed analytical method is simple, fast, and entails low solvent consumption. Furthermore, salicylic acid could be extracted from river water providing good recovery values in the range from 76.2 to 102.0% (RSD<8.2%). The combination of the specific chemical properties of analyte and the unique physicochemical features of carbon nanotubes sheds new light on the use of these nanoparticles as excellent sorbent materials of pharmaceutical compounds in environmental matrices.
本文研究了不同类型的碳纳米管对河水样品中水杨酸的吸附能力。在毛细管电泳分析之前，将这些纳米颗粒用作固相萃取过程中的吸附剂对于提高富集因子和回收率至关重要。为了使萃取效率最大化，对几个实验变量进行了优化。所提出的分析方法简单、快速，且溶剂消耗低。此外，从河水中提取水杨酸可提供76.2%至102.0%范围内的良好回收率（相对标准偏差<8.2%）。分析物的特定化学性质与碳纳米管独特的物理化学特性相结合，为这些纳米颗粒作为环境基质中药物化合物的优良吸附材料的应用提供了新的思路。
