Abstract

The problems and advantages of chromatographic methods for the determination of polycyclic aromatic hydrocarbons (PAHs) in model and real samples of black soil (chernozem), sand, and bottom sediments of the Sea of Azov and the Kurchansky estuary are discussed. We substantiated and implemented sample preparation for analysis using dispersion liquid–liquid microextraction. PAH concentrations in soils of various types and bottom sediments were determined by gas chromatography–mass spectrometry. The specific features of sample preparation of soil and bottom sediments are studied aimed at achieving the maximum recovery of PAHs into the organic phase; the composition of the extraction system and the conditions for the extraction of analytes are optimized; the optimal sample weight is selected. We proposed a gas chromatographic system with mass spectrometric detection (GC–MS) for determining 20 PAHs in soil (bottom sediments). The limits of quantification for the studied PAHs in soils and bottom sediments were 0.2–0.5 µg/kg. The optimized procedure for the GC–MS determination of PAHs was tested on real samples of bottom sediments of the Temryuk Bay of the Sea of Azov.

中文翻译：

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分散液-液微萃取气相色谱-质谱法测定土壤和底泥中的多环芳烃

摘要

讨论了色谱法测定亚速海和库尔坎斯基河口黑土（黑钙铁矿），沙子和底部沉积物的模型和实际样品中的多环芳烃（PAHs）的问题和优点。我们证实并实施了使用分散液-液微萃取进行分析的样品制备方法。通过气相色谱-质谱法测定各种类型的土壤和底部沉积物中的PAH浓度。研究了土壤和底部沉积物样品制备的特定特征，旨在最大程度地回收PAHs进入有机相。优化了萃取系统的组成和分析物的萃取条件；选择最佳样品重量。我们提出了一种采用质谱检测（GC-MS）的气相色谱系统，用于测定土壤（底部沉积物）中的20种多环芳烃。在土壤和底部沉积物中研究的多环芳烃的定量限为0.2–0.5 µg / kg。用GC-MS测定PAHs的最佳方法是在亚速海的Temryuk湾底部沉积物的真实样品上测试的。