Among Southeast Asian countries, Thailand has gradually accustomed to extremely prompt urbanization, motorization, and industrialization. Chonburi and Rayong provinces are two provinces involved in “eastern seaboard” industrial zones, which is an emerging economic region that plays a key role in Thailand's economy. The 2013 Rayong oil spill did not only cause damages to the coastal and maritime environment, but also undermine trust in the overall safety system and negatively affect the investor confidence. In this study, 69 coastal soils collected around Koh Samed Island were chemically extracted and analyzed for 15 PAHs by using a Shimadzu GCMS-QP2010 Ultra system comprising a high-speed performance system with ASSP function. In this study, numerous diagnostic binary ratios were applied to identify potential sources of PAHs. Advanced statistical techniques such as hierarchical cluster analysis coupled with principal component analysis were also conducted for further investigations of source identifications.

在东南亚国家中，泰国已逐渐习惯于极其迅速的城市化，机动化和工业化。春武里府和罗勇府是涉及“东部沿海”工业区的两个省，这是一个新兴的经济区，在泰国的经济中发挥着关键作用。2013年的罗勇（Rayong）漏油事件不仅对沿海和海洋环境造成损害，而且破坏了人们对整个安全系统的信任，并对投资者的信心产生了负面影响。在这项研究中，使用Shimadzu GCMS-QP2010 Ultra系统（包括具有ASSP功能的高速性能系统），化学提取了沙美岛周围收集的69种沿海土壤，并分析了15种PAHs。在这项研究中，许多诊断二元比率被应用于识别PAHs的潜在来源。