This research describes the development of a new design of electrospun nanosorbent, polystyrene/methacrylic acid nanofibers (PS/MAA NFs), for the extraction and preconcentration of Methyl green (MG) from aqueous samples via solid phase extraction (SPE). The experimental parameters affecting the SPE extraction efficiency including sample flow rate through the sorbent, ionic strength and pH of the sample solution, weight of sorbent, volume and type of eluent were investigated, and optimized. Under the optimum conditions (40 ml of 1 mg/L MG, pH: 5, sample flow rate: 2 ml/min, 0.1 g PS/MAA NFs and eluting solvent: 3 ml MeOH), the calibration curve was linear in the MG concentration range of 25–1,000 μg/L. The limit of detection and enhancement factor of the proposed method, for extraction from 40 ml sample solution, were obtained as 10 μg/L and 8.3, respectively. MG dye was extracted from different real samples (urban, mineral and river waters) using the proposed adsorbent and the results showed that PS/MAA NFs were suitable for preconcentration and determination of trace amount of methyl green in wastewater samples.

中文翻译：

---

静电甲基丙烯酸改性的聚苯乙烯纳米纤维作为固相吸附剂，用于从水溶液样品中预浓缩甲基绿

这项研究描述了电纺纳米吸附剂聚苯乙烯/甲基丙烯酸纳米纤维（PS / MAA NFs）的新设计的开发，用于通过固相萃取（SPE）从含水样品中萃取和预浓缩甲基绿（MG）。研究并优化了影响固相萃取萃取效率的实验参数，包括通过吸附剂的样品流速，样品溶液的离子强度和pH，吸附剂的重量，洗脱液的体积和类型。在最佳条件下（40 ml 1 mg / L MG，pH：5，样品流速：2 ml / min，0.1 g PS / MAA NFs和洗脱溶剂：3 ml MeOH），MG中的校准曲线是线性的浓度范围为25–1,000μg/ L。从40 ml样品溶液中提取所提方法的检出限和增强因子分别为10μg/ L和8.3，分别。使用所提出的吸附剂从不同的真实样品（城市，矿物质和河水）中提取了MG染料，结果表明PS / MAA NFs适用于预浓缩和测定废水样品中的痕量甲基绿。