Exploring commercial and inexpensive sorbents for extraction of organic pollutants is still an active area of research. Ultrahigh molecular weight polyethylene sieve plate (UMPESP) is a commercially available, low-cost, and porous frit, which has been widely used in solid-phase extraction cartridges to fix the filling materials. In this work, UMPESP was investigated for the extraction of polycyclic aromatic hydrocarbons (PAHs) from water samples. The desorption and sorption efficiencies of UMPESP were first evaluated and compared with two previously reported sorbents, low-density polyethylene plastic pellet (LDPEP) and silicone rod (SR). The comparative results showed that quantitative desorption of analytes from UMPESP, which could be easily achieved with 2 × 1.5 mL n-hexane, was more effective than that of LDPEP (>6 × 1.5 mL n-hexane) and comparable to that of SR. Additionally, shorter equilibrium time was rendered by UMPESP (shaking for 120 min) compared with SR (>480 min), due to the porous structure and larger surface area of the former. Different parameters that affect the extraction efficiency, including organic modifier, ionic strength, and pH value, were then studied. The optimized method coupled with gas chromatography–mass spectrometry afforded good linearity in a concentration range of 10–5000 ng L⁻¹ (except acenaphthene in the range of 25–5000 ng L⁻¹) with coefficients of determination ranging from 0.9957 to 0.9995 and relative standard deviations below 13.8%. The limits of detection and quantification were 0.04–3.35 ng L⁻¹ and 0.13–11.16 ng L⁻¹, respectively. Finally, the method was successfully applied to determine PAHs in real water samples, and the results showed no statistically significant difference with the concentrations derived from liquid–liquid extraction.

Graphical abstract

中文翻译：

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商用多孔聚乙烯熔块从水中提取多环芳烃的评估

探索用于提取有机污染物的商业和廉价吸附剂仍然是研究的活跃领域。超高分子量聚乙烯筛板（UMPESP）是一种可商购的，低成本且多孔的玻璃料，已广泛用于固相萃取滤芯中以固定填充材料。在这项工作中，对UMPESP进行了研究，以从水样中提取多环芳烃（PAHs）。首先评估了UMPESP的解吸和吸附效率，并与先前报道的两种吸附剂，低密度聚乙烯塑料颗粒（LDPEP）和硅棒（SR）进行了比较。比较结果表明，使用2×1.5 mL n可以轻松实现UMPESP中分析物的定量解吸。己烷，比LDPEP的更有效（> 6×1.5毫升Ñ己烷）和比得上SR的。此外，由于UMPESP的多孔结构和较大的表面积，与SR（> 480分钟）相比，通过UMPESP（摇晃120分钟）可以缩短平衡时间。然后研究了影响萃取效率的不同参数，包括有机改性剂，离子强度和pH值。优化的方法与气相色谱-质谱联用可在10-5000 ng L ^-1的浓度范围内提供良好的线性（except烯在25-5000 ng L ^-1的范围内除外））的测定系数范围为0.9957至0.9995，相对标准偏差低于13.8％。检测限和定量限分别为0.04–3.35 ng L ^-1和0.13–11.16 ng L ^-1。最后，该方法成功地用于测定实际水样中的多环芳烃，结果显示与液-液萃取中的浓度无统计学差异。

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