Institute on Atmospheric Pollution (IIA), National Research Council of Italy (CNR), Via Salaria km 29,300, Monterotondo, 00015 Rome, Italy.
Molecules. 2021 Oct 23;26(21):6407. doi: 10.3390/molecules26216407.
Active carbon-based sorbents are well known and are used in analytical chemistry. Activated carbon fibers (ACFs) are mainly used as abatement systems in industrial emission pollution control. The objective of this study was to extend the use of ACFs in analytical chemistry for the analysis of polychlorodibenzo-p-dioxins (PCDDs), polychlorodibenzofurans (PCDFs), dioxin-like polychlorobiphenyls (PCBs), and chlorobenzenes (CBs). For this purpose, the extraction efficiency was evaluated based on the QA/QC criteria defined by EPA/ISO reference methods on C-standards recovery rates. The procedures tested were ultrasonic assisted extraction (UAE), Soxhlet extraction (SE), accelerated solvent extraction (ASE), and microwave-assisted extraction (MAE). Each experiment was performed in triplicate to ensure the repeatability of the results, and a second extraction assessed the complete extraction. The comparison of the results of each set of experiments with the minimum requirements of the reference methods for each class of compounds led to SE being chosen as the best technique. SE with toluene resulted in a reduction of time and costs and with respect to the other investigated techniques. The present work demonstrated that ACFs can be used in environmental fields means of both prevention and control (exploiting the adsorbent characteristics) and for analytical purposes (exploiting the desorption) for the described chlorinated classes of pollutants.
活性炭基吸附剂是众所周知的，并且在分析化学中得到了广泛的应用。活性炭纤维（ACFs）主要用作工业排放污染控制中的减排系统。本研究的目的是将 ACFs 扩展到分析化学中，用于分析多氯二苯并对二恶英（PCDDs）、多氯二苯并呋喃（PCDFs）、类似二恶英的多氯联苯（PCBs）和氯苯（CBs）。为此，根据 EPA/ISO 参考方法中规定的质量保证/质量控制（QA/QC）标准，评估了萃取效率，以 C-标准回收率来衡量。测试的程序包括超声辅助提取（UAE）、索氏提取（SE）、加速溶剂提取（ASE）和微波辅助提取（MAE）。每个实验都进行了三次重复，以确保结果的可重复性，并进行了第二次萃取以评估是否完全提取。将每组实验的结果与每种化合物类别的参考方法的最低要求进行比较，结果表明 SE 是最佳技术。与甲苯一起使用的 SE 在时间和成本方面优于其他研究的技术。本工作表明，ACFs 可以用于环境领域的预防和控制（利用吸附剂的特性）以及分析目的（利用解吸），用于描述的氯化类污染物。
