太湖西岸地表水中极性有机污染物非靶向筛查与生态风险评估

环境中新兴污染物层出不穷，已经成为当前环境研究的关键问题.为全面筛查太湖西岸武进和宜兴地区地表水中的潜在极性有机污染物，基于高效液相色谱和飞行时间质谱联用技术进行非靶向筛查，利用精确质量数、同位素分布和二级碎片信息进行质谱库匹配共识别出162个有机物，包括46种农药、34种药物、8种个人护理产品、27种添加剂、17种有机合成中间体和30种动植物代谢物或天然物质，其中45个有机物经过标准品验证.对42种污染物进行定量分析并对3种营养级模式生物物种进行生态风险评估，发现25种污染物具有中等风险以上，12种污染物具有高风险.非靶向筛查能够在无先验信息和标准品的情况下全面识别潜在未知污染物，不仅快速、准确和分析通量高，还能为后续生态风险评估提供重要的依据.

Nontarget Screening and Ecological Risk Assessment of Polar Organic Pollutants in Surface Water on the West Bank of Taihu Lake

Emerging pollutants occur in the environment, which has become a pressing issue for environmental research. In order to comprehensively screen potential polar organic pollutants in surface water of Wujin and Yixing in the Taihu Lake Basin, nontarget screening was carried out by high performance liquid chromatography(HPLC) and time of flight mass spectrometry(TOF-MS). Screened by accurate mass, isotope distribution, and MS/MS information, 162 organic compounds were identified, including 46 pesticides, 34 drugs, 8 personal care products, and 27 additives; 17 organic synthetic intermediates and 30 metabolites, 45 of which have been verified by reference standards. Through the quantitative analysis of 42 pollutants and ecological risk assessment of 3 trophic model species, it was found that 25 pollutants posed medium risk while 12 pollutants presented high risk. Nontarget screening can be used to identify potential pollutants with no prior information or standards. It is not only fast, accurate, and has high analytical flux, but also provides an important basis for subsequent ecological risk assessment.