3月航次,在本区38个测站上采集了表层沉积物样品。取样后,立即封于塑料袋中,低温贮存。分析前,将样品自然风干,经玛瑙研钵研磨,过80目尼龙筛。分析了样品中的Cu、CO,Ni、Zn、Cd和As的含量。其中,测定Ni、Co、Zn和Cu的样品,经HNO_3—HF—HCIO_4压热消化,用原子吸收分光光度法测定其含量,测定As和Cd的样品,用HNO_3—H_2SO_4消化,分别用银盐比色法和无火焰原子分光光度法测定其 March voyage, in the area 38 stations collected surface sediment samples. After sampling, immediately sealed in plastic bags, low temperature storage. Before analysis, the samples were air-dried and ground in an agate mortar and passed through a 80 mesh nylon sieve. The content of Cu, CO, Ni, Zn, Cd and As in the sample was analyzed. Among them, samples of Ni, Co, Zn and Cu were determined and hydrothermally digested with HNO_3-HF-HCIO_4, their contents were determined by atomic absorption spectrophotometry. Samples of As and Cd were determined and digested with HNO_3-H_2SO_4. Colorimetric and flameless atomic spectrophotometric determination