【摘要】 作者以阳极溶出伏安法和氢氧化铁共沉淀—DDC—Ag法测定了黄河口表层海水中溶解态总砷、溶解态有机砷、溶解无机砷、砷（Ⅲ）和砷（Ⅴ）的含量。实验结果表明:1、黄河口区表层海水中丰水期溶解态无机砷的平均浓度(2.26μgL^-1)高于枯水期的平均浓度(1.43μgL^-1);2、枯水期内,表层海水中溶解态无机砷浓度与海水盐度之间存在良好的相关性,而在丰水期内无此相关关系;3、两航次中溶解态无机砷的平面分布呈明显的梯度分布,即由河口向渤海湾中部方向溶解态无机砷浓度递减。更多还原

【Abstract】 The contents of the total dissolved arsenic, dissolved organic arsenic, inorganic arsenic, inorganic arsenic, arsenic (Ⅲ ) and arsenic (Ⅴ) in seawater from the Huanghe River Estuary have been determined by using the anodic stripping voltametry and the Fe(OH)3 coprecipitation- DDC-Ag methods. The concentration ranges in μgL-1 of the total dissolved arsenic, dissolved organic arsenic, dissolved inorganic arsenic, dissolved arsenic (Ⅲ) and arsenic (Ⅴ) in the seawater of the first cruise from the Huanghe River Estuary are. 2.83-4.33, 1.26-2.93, 0.69-2.32, 0.304-0.767 and 0.248-1.38, with the mean values of 3 58, 2.30, 1.43, 0.476 and 0.767 respectively.The results show that: ( 1 ) The mean concentra tions of the dissolved inorganic arsenic in the surface seawater in the rainy season are higher than that in the dry season ( 2 ) A good negative correlation exists between the dissolved inorganic arsenic concentration and salinity in the surface water during the dry season, but it is not good for the rainy season. ( 3 ) The horizontal distribution of the dissolved inorganic arsenic during these two cruises has an obvious gradient decreasing from the Huanghe River essuary toward the centre of Boha i Bay.更多还原