State Key Laboratory of Marine Environmental Science, Fujian Provincial Key Laboratory for Coastal Ecology and Environmental Studies, Center for Marine Environmental Chemistry & Toxicology, College of the Environment and Ecology, Xiamen University, Xiamen 361102, China.
State Key Laboratory for Physical Chemistry of Solid Surfaces, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China.
Spectrochim Acta A Mol Biomol Spectrosc. 2020 Jun 15;234:118250. doi: 10.1016/j.saa.2020.118250. Epub 2020 Mar 9.
Polycyclic aromatic hydrocarbons (PAHs) are among the most hazardous pollutants and have attracted significant attention in the last decades. Up to now, rapid and on-site trace detection of PAHs remains a challenging issue. Here, taking advantage of the high sensitivity and reliable qualification of Surface-enhanced Raman Spectroscopy (SERS), we firstly carried out trace analyses of 16 typical PAHs in water at concentrations as low as 100-0.1 μg/L, depending on the number of aromatic rings of the molecule. Furthermore, owing to the simplicity of the liquid-liquid extraction (LLE) step, the sensitivity was further improved 2-3 orders of magnitude, and the lowest detectable concentrations were 100, 50, and 5 ng/L for anthracene, pyrene, and benzo[a]pyrene (the three PAHs typically found in heavily polluted waters), respectively. The LLE-SERS approach was successfully applied to the qualitative and quantitative analyses of different (ocean and coast) water samples being spiked by these three PAHs, which showed great promise as a trace detection tool of PAHs under water environments having different contaminant matrices.
多环芳烃（PAHs）是最危险的污染物之一，在过去几十年中引起了广泛关注。到目前为止，快速和现场痕量检测 PAHs 仍然是一个具有挑战性的问题。在这里，我们利用表面增强拉曼光谱（SERS）的高灵敏度和可靠定性优势，首次在水中对 16 种典型的 PAHs 进行了痕量分析，浓度低至 100-0.1μg/L，具体取决于分子的芳香环数。此外，由于液-液萃取（LLE）步骤简单，灵敏度进一步提高了 2-3 个数量级，对于蒽、芘和苯并[a]芘（这三种通常在污染严重的水中发现的 PAHs），最低可检测浓度分别为 100、50 和 5ng/L。LLE-SERS 方法成功应用于三种 PAHs 污染的不同（海洋和沿海）水样的定性和定量分析，有望成为不同污染物基质水环境中痕量检测 PAHs 的工具。
