Key Laboratory of Bioinorganic Chemistry, College of Science, Agricultural University of Hebei, Baoding 071001, China.
Anal Chim Acta. 2011 Dec 5;708(1-2):155-9. doi: 10.1016/j.aca.2011.10.006. Epub 2011 Oct 14.
In this paper, a graphene-based Fe(3)O(4) magnetic nanoparticles (G-Fe(3)O(4) MNPs) was used as the adsorbent for the magnetic solid-phase extraction of some triazine herbicides (atrazine, prometon, propazine and prometryn) in environmental water samples followed by high performance liquid chromatography-diode array detection (HPLC-DAD). After the extraction, the adsorbent can be conveniently separated from the aqueous samples by an external magnet. The main factors influencing the extraction efficiency including the amount of the MNPs, the extraction time, the pH of sample solution, and desorption conditions were studied and optimized. Under the optimized experimental conditions, a good linearity was observed in the range of 0.1-50.0 ng mL(-1) for all the analytes, with the correlation coefficients (r) ranging from 0.9996 to 0.9999. The limits of detection of the method ranged between 0.025 and 0.040 ng mL(-1). Good reproducibility was obtained with the relative standard deviations below 5.2%. The developed method was applied to the analysis of the triazine herbicides in different water samples (lake, river and reservoir). The recoveries of the method were in the range between 89.0% and 96.2%.
在本文中，使用基于石墨烯的 Fe(3)O(4)磁性纳米粒子（G-Fe(3)O(4) MNPs）作为吸附剂，用于环境水样中一些三嗪类除草剂（莠去津、扑灭津、扑灭通和扑灭净）的磁固相萃取，然后用高效液相色谱-二极管阵列检测（HPLC-DAD）进行分析。萃取后，吸附剂可以通过外部磁铁方便地从水样中分离出来。研究并优化了影响萃取效率的主要因素，包括 MNPs 的用量、萃取时间、样品溶液的 pH 值和洗脱条件。在优化的实验条件下，所有分析物在 0.1-50.0ngmL(-1)范围内均呈现良好的线性关系，相关系数（r）范围为 0.9996 至 0.9999。该方法的检出限在 0.025 和 0.040ngmL(-1)之间。该方法具有良好的重现性，相对标准偏差低于 5.2%。该方法应用于不同水样（湖泊、河流和水库）中三嗪类除草剂的分析。该方法的回收率在 89.0%至 96.2%之间。
