Najarzadekan Hamid, Sereshti Hassan, Ahmad Irfan, Shahabuddin Syed, Rashidi Nodeh Hamid, Sridewi Nanthini
School of Chemistry, College of Science, University of Tehran, Tehran 1417614411, Iran.
Department of Clinical Laboratory Sciences, College of Applied Medical Sciences, King Khalid University, Abha 61421, Saudi Arabia.
Polymers (Basel). 2022 Sep 5;14(17):3682. doi: 10.3390/polym14173682.
A new solid phase micro extraction (SPME) fiber coating composed of electrospun polyethylene terephthalate (PET) nanofibrous mat doped with superhydrophobic nanosilica (SiO2) was coated on a stainless-steel wire without the need of a binder. The coating was characterized by scanning electron microscopy (SEM) and Fourier transform infrared spectrometer (FTIR) techniques and it was used in headspace-SPME of 16 organochlorine pesticides in water samples prior to gass chromatography micro electron capture detector (GC-µECD) analysis. The effects of main factors such as adsorption composition, electrospinning flow rate, salt concentration, extraction temperature, extraction time, and desorption conditions were investigated. Under the optimum conditions, the linear dynamic range (8−1000 ng L−1, R2 > 0.9907), limits of detection (3−80 ng L−1), limits of quantification (8−200 ng L−1), intra-day and inter-day precisions (at 400 and 1000 ng L−1, 1.7−13.8%), and fiber-to-fiber reproducibility (2.4−13.4%) were evaluated. The analysis of spiked tap, sewage, industrial, and mineral water samples for the determination of the analytes resulted in satisfactory relative recoveries (78−120%).
一种新型的固相微萃取（SPME）纤维涂层由掺杂超疏水纳米二氧化硅（SiO₂）的电纺聚对苯二甲酸乙二酯（PET）纳米纤维毡组成，无需粘合剂即可涂覆在不锈钢丝上。通过扫描电子显微镜（SEM）和傅里叶变换红外光谱仪（FTIR）技术对该涂层进行了表征，并将其用于水样中16种有机氯农药的顶空固相微萃取，然后进行气相色谱微电子捕获检测器（GC-µECD）分析。研究了吸附成分、电纺流速、盐浓度、萃取温度、萃取时间和解吸条件等主要因素的影响。在最佳条件下，评估了线性动态范围（8−1000 ng L⁻¹，R² > 0.9907）、检测限（3−80 ng L⁻¹）、定量限（8−200 ng L⁻¹）、日内和日间精密度（在400和1000 ng L⁻¹时，1.7−13.8%）以及纤维间重现性（2.4−13.4%）。对加标自来水、污水、工业水和矿泉水样品进行分析以测定分析物，得到了令人满意的相对回收率（78−120%）。
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