Hainan Island, the largest tropical island in China, is a notable source of pollutants, with a significant proportion of terrigenous contaminants discharged into the ocean. Platinum group elements (PGEs) pose potential risks to both the environment and human health, but research on this topic remains limited. In this study, we analyzed water from Hainan Island offshore area to investigate distribution characteristics of PGEs and its trend into the sea. It is found that the concentration of dissolved PGEs (PGEs