Eskandarpour Niloufar, Sereshti Hassan
Department of Chemistry, Faculty of Science, University of Tehran, Tehran, Iran.
Department of Chemistry, Faculty of Science, University of Tehran, Tehran, Iran.
Chemosphere. 2018 Jan;191:36-43. doi: 10.1016/j.chemosphere.2017.10.029. Epub 2017 Oct 5.
The nanofibrous polycaprolactam (polyamide 6 (PA6)) incorporated with manganese oxide (MnO) nanoparticles was fabricated by electrospinning and used as a new fiber coating for headspace-solid phase microextraction (HS-SPME) of the selected phthalate esters (PEs) in water samples prior to GC-μECD. The adsorbent was fully characterized using scanning electron microscopy (SEM), Fourier transform-infrared (FT-IR) spectroscopy and thermogravimetric analysis (TGA). The main parameters that affect the HS-SPME efficiency such as extraction temperature, ionic strength, extraction and desorption times were investigated. The analytical figures of merit were obtained under the optimized conditions as follows: linear dynamic range (LDR), 0.500-5.00 × 10 ng mL; relative standard deviations (RSDs, n = 3), 1.86-10.9%; limits of detection (LODs), 0.0400-0.193 ng mL. The method was applied for determination of the target analytes in river water, bottled water, mineral water and soda samples and the relative recoveries were obtained between 90.3 and 107%.
通过静电纺丝制备了负载氧化锰（MnO）纳米颗粒的纳米纤维聚己内酰胺（聚酰胺6，PA6），并将其用作一种新型纤维涂层，用于在气相色谱 - 微池电子捕获检测器（GC - μECD）分析之前对水样中选定的邻苯二甲酸酯（PEs）进行顶空固相微萃取（HS - SPME）。使用扫描电子显微镜（SEM）、傅里叶变换红外（FT - IR）光谱和热重分析（TGA）对吸附剂进行了全面表征。研究了影响HS - SPME效率的主要参数，如萃取温度、离子强度、萃取和解吸时间。在优化条件下获得的分析性能指标如下：线性动态范围（LDR）为0.500 - 5.00×10 ng mL；相对标准偏差（RSDs，n = 3）为1.86 - 10.9%；检测限（LODs）为0.0400 - 0.193 ng mL。该方法用于测定河水、瓶装水、矿泉水和苏打水样品中的目标分析物，相对回收率在90.3%至107%之间。
