Zhou Qingxiang, Xiao Junping, Wang Weidong, Liu Guoguang, Shi Qizeng, Wang Jianhong
School of Chemistry and Environmental Sciences, Henan Normal University, Henan Key Laboratory for Environmental pollution Control, Xinxiang 453007, PR China.
Talanta. 2006 Feb 15;68(4):1309-15. doi: 10.1016/j.talanta.2005.07.050. Epub 2005 Oct 3.
Multiwalled carbon nanotubes, a new nanoscale material, has been gained many interests for use in various fields, and has exhibited exceptional merit as SPE absorbents for enrichment of environmental pollutants. This paper focused on the enriching power of atrazine and simazine, two important widely used triazine herbicides and described a novel and sensitive method for determination of these two herbicides based on SPE using multiwalled carbon nanotubes as solid phase absorbents followed by high performance liquid chromatography with diode array detector. Factors that maybe affect the enrichment efficiency of multiwalled carbon nanotubes such as the volume of eluent, sample flow rate, sample pH, and volume of the water samples were optimized. Under the optimal procedures, multiwalled carbon nanotubes as the absorbents have obtained excellent enrichment efficiency for atrazine and simazine. The detection limits of the atrazine and simazine were 33 and 9ngl(-1), respectively. The spiked recoveries of the two analytes were over the range of 82.6-103.7% in most cases. Good analytical performance was achieved from real-world water samples such as river water, reservoir water, tap water and wastewater after primary pretreatment with proposed method. All these experimental results indicated that the developed method could be used as an alternative for the routine analysis of atrazine and simazine in many real water samples.
多壁碳纳米管作为一种新型纳米材料，在各个领域的应用已引起广泛关注，并且作为用于富集环境污染物的固相萃取吸附剂展现出卓越的性能。本文着重研究了莠去津和西玛津这两种广泛使用的重要三嗪类除草剂的富集能力，并描述了一种基于固相萃取的新型灵敏方法来测定这两种除草剂，该方法使用多壁碳纳米管作为固相吸附剂，随后结合配备二极管阵列检测器的高效液相色谱法。对可能影响多壁碳纳米管富集效率的因素，如洗脱液体积、样品流速、样品pH值和水样体积进行了优化。在最佳条件下，多壁碳纳米管作为吸附剂对莠去津和西玛津具有优异的富集效率。莠去津和西玛津的检测限分别为33和9 ng l⁻¹。在大多数情况下，两种分析物的加标回收率在82.6 - 103.7%范围内。采用所提出的方法对河水、水库水、自来水和废水等实际水样进行初步预处理后，获得了良好的分析性能。所有这些实验结果表明，所建立的方法可作为许多实际水样中莠去津和西玛津常规分析的替代方法。
