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首页> 外文期刊>Talanta: The International Journal of Pure and Applied Analytical Chemistry >Testing of nylon 6 nanofibers with different surface densities as sorbents for solid phase extraction and their selectivity comparison with commercial sorbent
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Testing of nylon 6 nanofibers with different surface densities as sorbents for solid phase extraction and their selectivity comparison with commercial sorbent

机译：用不同表面密度的尼龙6纳米纤维的测试作为固相提取的吸附剂及其与商用吸附剂的选择性比较

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摘要

Nylon 6 nanofibers were tested for their ability to serve as a sorbent for solid phase extraction (SPE). The regular nanostructure providing a great sorption area and amidic functionality should lead to the assumption that nylon 6 nanofibers could be used as a novel sorbent with great potential for sample pre-treatment. However, due to the substantial differences between classical particle sorbents used for solid phase extraction and nanofibers, it is necessary to evaluate this novel approach. This article describes three types of laboratory fabricated nylon 6 nanofibers with different surface density (5.04 g m(-2), 3.90 gm(-2) and 0.75 g m(-2)) and corresponding surface areas for solid phase extraction of several groups of compounds with different structural and physicochemical properties (parabens, steroids, flavonoids and pesticides). The nanofibers were created by needleless electro-spinning. Extraction columns were manually packed in classic 1- or 3-mL plastic syringe cartridges with 26-30 mg of nanofibers and the column bed was sealed with polypropylene frits. The SPE procedure followed a typical five-step protocol and the collected eluates were analyzed by HPLC with UV detection. Extraction recovery was used as a parameter to evaluate the behavior of the analytes within the SPE process. Under this set condition, the recovery of the SPE process ranged from 23.1% to 125.8%. SPE showed good repeatability (0.58-11.87% RSD) and inter-day reproducibility (3.86-9.79% RSD). The achieved results were compared with SPE using a classic particle sorbent column. Good mechanical and chemical stability of nanofibers was proved. Scanning electron microscope was used for the evaluation of morphological changes in nanostructure. Nylon 6 nanofibers proved being a cost-effective sorbent for repeated use in SPE, Nylon 6 nanofibers have great potential in miniaturized SPE enabling users to overcome troubles with high back-pressure.
机译：测试尼龙6纳米纤维的用作固相萃取（SPE）的吸附剂的能力。提供了较大的吸附区域和酰胺型功能的常规纳米结构应导致假设尼龙6纳米纤维可以用作新的吸附剂，其具有巨大的样品预处理潜力。然而，由于用于固相萃取和纳米纤维的经典颗粒吸附剂之间的显着差异，因此需要评估这种新方法。本文介绍了三种类型的实验室制造的尼龙6纳米纤维，具有不同的表面密度（5.04克（-2），3.90gm（-2）和0.75克（-2）），以及用于几组化合物的固相提取的相应表面积具有不同的结构和物理化学性质（羟基苯甲酸酯，类固醇，黄酮类药物和农药）。纳米纤维是通过无针电纺织的。提取柱在经典的1-或3ml塑料注射器盒中填充，含有26-30mg纳米纤维，柱床用聚丙烯玻璃料密封。 SPE程序跟随典型的五步方案，通过HPLC进行紫外检测分析收集的洗脱液。提取恢复用作参数以评估SPE过程中分析物的行为。在该设定条件下，SPE过程的回收率范围为23.1％至125.8％。 SPE显示出良好的重复性（RSD 0.58-11.87％）和日内的再现性（3.86-9.79％RSD）。使用经典粒子吸附剂柱将达到的结果与SPE进行比较。证明了纳米纤维的良好机械和化学稳定性。扫描电子显微镜用于评估纳米结构的形态变化。尼龙6纳米纤维被证明是一种经济型吸附剂，用于在SPE中重复使用，尼龙6纳米纤维在小型化SPE中具有很大的潜力，使用户能够克服高背压的麻烦。

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