Charles University, Faculty of Pharmacy in Hradec Králové, Department of Analytical Chemistry, Akademika Heyrovského 1203, 500 05, Hradec Králové, Czech Republic.
The Technical University of Liberec, Faculty of Textile Engineering, Department of Nonwovens and Nanofibrous Materials, Studentská 1402/2, 46001, Liberec 1, Czech Republic.
Talanta. 2023 Oct 1;263:124688. doi: 10.1016/j.talanta.2023.124688. Epub 2023 May 25.
A novel method for the extraction of river water contaminants as model analytes of ranging polarities, including bisphenols A, C, S, Z, fenoxycarb, kadethrin, and deltamethrin, using small compact fibrous disks has been developed and validated. Polymer nanofibers and microfibers prepared from poly(3-hydroxybutyrate), polypropylene, polyurethane, polyacrylonitrile, poly(lactic acid), and polycaprolactone doped with graphene were evaluated in terms of extraction efficiency, selectivity, and stability in organic solutions. Our novel extraction procedure comprised preconcentration of analytes from 150 mL river water to 1 mL of eluent using a compact nanofibrous disk freely vortexed in the sample. Small nanofibrous disks with a diameter of 10 mm were cut from a compact and mechanically stable 1-2 mm thick micro/nanofibrous sheet. After 60 min extraction in a magnetically stirred sample located in a beaker, the disk was removed from the liquid and washed with water. Then, the disk was inserted into a 1.5 mL HPLC vial and extracted with 1.0 ml methanol upon short intensive shaking. Our approach avoided the undesired problems related to the manual handling typical of "classical" SPE procedure since the extraction was carried out directly in the HPLC vial. No sample evaporation, reconstitution, or pipetting was required. The nanofibrous disk is affordable, needs no support or holder, and its use avoids creation of plastic waste originating from disposable materials. Recovery of compounds from the disks was 47.2-141.4% depending on the type of polymer used and the relative standard deviations calculated from 5 extractions ranged from 6.1 to 11.8% for poly(3-hydroxybutyrate), 6.3-14.8% for polyurethane, and 1.7-16.2% for polycaprolactone doped with graphene. A small enrichment factor was obtained for polar bisphenol S using all sorbents. A higher preconcentration reaching up to 40-fold was achieved for lipophilic compounds such as deltamethrin when using poly(3-hydroxybutyrate) and graphene-doped polycaprolactone.
一种新型的河流污染物提取方法已经被开发和验证，该方法使用小型紧凑纤维圆盘作为模型分析物，包括范围广泛的极性双酚 A、C、S、Z、fenoxycarb、kadethrin 和 deltamethrin。从聚（3-羟基丁酸酯）、聚丙烯、聚氨酯、聚丙烯腈、聚乳酸和聚己内酯制备的掺杂石墨烯的聚合物纳米纤维和微纤维，从萃取效率、选择性和在有机溶剂中的稳定性方面进行了评估。我们的新型提取程序包括将 150 mL 河水预浓缩至 1 mL 洗脱液，使用自由涡旋在样品中的紧凑纳米纤维圆盘进行。从 1-2 毫米厚的紧凑且机械稳定的微/纳米纤维片上切下直径为 10 毫米的小纳米纤维圆盘。在位于烧杯中的磁性搅拌样品中萃取 60 分钟后，将圆盘从液体中取出并用水洗。然后，将圆盘插入 1.5 mL HPLC 小瓶中，并在短时间剧烈摇动下用 1.0 mL 甲醇进行提取。我们的方法避免了与“经典”SPE 程序相关的手动处理的不期望问题，因为萃取直接在 HPLC 小瓶中进行。无需蒸发、重构或移液。纳米纤维盘价格实惠，不需要支撑或支架，使用它避免了源自一次性材料的塑料废物的产生。根据所用聚合物的类型，从圆盘上回收化合物的回收率为 47.2-141.4%，从 5 次萃取计算得到的相对标准偏差为 6.1-11.8%用于聚（3-羟基丁酸酯），6.3-14.8%用于聚氨酯，和 1.7-16.2%用于掺杂石墨烯的聚己内酯。使用所有吸附剂都可以获得极性双酚 S 的小富集因子。当使用聚（3-羟基丁酸酯）和掺杂石墨烯的聚己内酯时，对于疏水性化合物如 deltamethrin 可以实现高达 40 倍的高浓度预浓缩。
