Arsenic (As) and mercury (Hg) are pollutants presented in marine environment. A process of atomic fluorescence spectrometry was proposed for the simultaneous determination of As and Hg in marine sediment samples (n = 38) collected from the Changjiang River Estuary and adjacent East China Sea. The proposed method used an optimized pretreatment procedure in an aqua regia-H₂O digestion system. Recoveries of As and Hg increased to 97% and 98%, respectively, with suitable precisions (2.7%–4.1%) under optimized process conditions. As and Hg were widely presented in these samples, with the ranges of content values were 2.39–8.77 µg/g for As and 48.03–410.8 ng/g for Hg. Results indicate that anthropogenic factors strongly influence the abundances of As and Hg in investigated samples. The preliminary environmental risk assessment was investigated using the geoaccumulation index (I_geo) and anthropogenic contribution rate (M). Findings reveal that Hg demonstrates a strong ecological risk (with average values of 1.3 and 72% for I_geo and M, respectively) in the sediments from the Changjiang River Estuary and adjacent East China Sea. Therefore, Hg should be considered in future investigations.

砷（As）和汞（Hg）是海洋环境中存在的污染物。提出了一种原子荧光光谱法同时测定从长江口和邻近东海收集的海洋沉积物样品（n = 38）中的砷和汞的方法。所提出的方法在王水-H _2中使用了优化的预处理程序O消化系统。在优化的工艺条件下，砷和汞的回收率分别提高到97％和98％，并具有合适的精度（2.7％–4.1％）。这些样品中砷和汞的含量很高，砷的含量值范围为2.39-8.77 µg / g，汞的含量值范围为48.03-410.8 ng / g。结果表明，人为因素强烈影响调查样品中砷和汞的含量。初步的环境风险评估是利用_地质累积指数（I _geo）和人为贡献率（M）进行的。研究结果表明，汞具有很强的生态风险（I _geo和M的平均值分别为1.3和72％分别位于长江口和东海附近的沉积物中。因此，在将来的调查中应考虑汞。