砷,是在自然界中分布较广的一种元素。其化合物毒性较大,特别是在还原状态下形成的三价砷更是具有较强的致癌作用。目前已知的致癌物质不下一千种,但通过人类流行病学证实的数量有限。在这些有限的已知职业性致癌物中,砷是名列前矛的。据国内外有关资料报道,砷可以引起呼吸道、肺及皮肤癌。所以了解环境中砷的存在及分布是评价环境质量的一个重要因子。滨临胶州湾的青岛,不仅是我国著名的避暑胜地,而且也是国内外令人向往的旅游之地。因此,胶州湾的污染状况及发展趋势对其环境质量的评价,日益引起了人们的密切关注。本工作通过对胶州湾水质、底质中砷的测定,初步找出了其水平和铅直分布变化情况及规律, Arsenic is a widely distributed element in nature. Its compounds are more toxic, especially in the reduction of the formation of trivalent arsenic is more carcinogenic. There are no more than a thousand known carcinogens, but the limited number of confirmed human epidemiology. Among these limited known occupational carcinogens, arsenic is among the best. According to domestic and international information reported that arsenic can cause respiratory tract, lung and skin cancer. Therefore, understanding the presence and distribution of arsenic in the environment is an important factor to evaluate the environmental quality. Located in Jiaozhou Bay, which is near Binhai, Qingdao is not only a famous summer resort in China, but also a desirable destination for tourism at home and abroad. Therefore, the assessment of the environmental quality of the pollution status and development trend of Jiaozhou Bay has aroused people’s close attention day by day. Through the determination of arsenic in the water quality and sediment of Jiaozhou Bay, this work has initially found the changes of its level and vertical distribution and the law,