Research on Pretreatment Methods for Quantitative Detection of Polycyclic Aromatic Hydrocarbons in Soil

Abstract

With the increasing practice of modern industrialization in society, the environmental pollution problems caused by persistent organic pollutants, especially polycyclic aromatic hydrocarbons (PAHs), have attracted widespread attention. PAHs are widely present in the incomplete combustion products of fossil fuels such as coal and oil, and may pose a threat to human health through the food chain. Therefore, accurate detection of PAHs in soil is extremely important for evaluating the environmental pollution status and its impact on human health. This study systematically investigated the pretreatment methods for PAHs in soil, compared the extraction efficiencies of the accelerated solvent extraction method (ASE) among different extraction techniques, and analyzed the impact of the concentration and purification techniques of the extract on the recovery rate. The study found that under specific temperature and pressure conditions, the optimized ASE technique can achieve a higher recovery rate of PAHs compared with the traditional Soxhlet extraction technique. This study provides effective technical support for environmental monitoring and risk assessment, and has important guiding significance for the scientific prevention and control of soil pollution and the improvement of environmental quality.