Department of Chemistry, Faculty of Science, Universiti Teknologi Malaysia, Skudai, Johor, Malaysia.
J Chromatogr A. 2010 Mar 12;1217(11):1767-72. doi: 10.1016/j.chroma.2010.01.053. Epub 2010 Jan 25.
A novel microextraction technique termed solid phase membrane tip extraction (SPMTE) was developed. Selected triazine herbicides were employed as model compounds to evaluate the extraction performance and multiwall carbon nanotubes (MWCNTs) were used as the adsorbent enclosed in SPMTE device. The SPMTE procedure was performed in semi-automated dynamic mode and several important extraction parameters were comprehensively optimized. Under the optimum extraction conditions, the method showed good linearity in the range of 1-100 microg/L, acceptable reproducibility (RSD 6-8%, n=5), low limits of detection (0.2-0.5 microg/L), and satisfactory relative recoveries (95-101%). The SPMTE device could be regenerated and reused up to 15 analyses with no analyte carry-over effects observed. Comparison was made with commercially available solid phase extraction-molecular imprinted polymer cartridge (SPE-MIP) for triazine herbicides as the reference method. The new developed method showed comparable or even better results against reference method and is a simple, feasible, and cost effective microextraction technique.
一种新型的微萃取技术，称为固相膜尖端萃取（SPMTE），已被开发出来。选定的三嗪除草剂被用作模型化合物，以评估萃取性能，多壁碳纳米管（MWCNTs）被用作封装在 SPMTE 装置中的吸附剂。SPMTE 程序以半自动动态模式进行，综合优化了几个重要的萃取参数。在最佳萃取条件下，该方法在 1-100 μg/L 范围内表现出良好的线性，可接受的重现性（RSD 6-8%，n=5），低检测限（0.2-0.5 μg/L）和令人满意的相对回收率（95-101%）。SPMTE 装置可在 15 次分析中再生和重复使用，没有观察到分析物的携带效应。与市售的三嗪除草剂固相萃取-分子印迹聚合物（SPE-MIP）进行了比较，作为参考方法。与参考方法相比，新开发的方法显示出可比甚至更好的结果，是一种简单、可行且具有成本效益的微萃取技术。
