阳极溶出伏安法测定海水中低浓度镉
THE DETERMINATION OF LOW LEVELS CADMIUM IN SEAWATER BY ANODIC STRIPPING VOLTAMMETRY
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摘要: 镉能积累于人体及生物体内造成慢性中毒,引起严重的“骨头病”[1],并与严重的心血管病有连带关系[2].海洋中镉的污染问题已引起人们极大的重视.目前,我国与世界其他国家一样,已将镉的污染列为国家海洋环境重点监测项目之一.Abstract: A simple and rapid m}athod for the determination of Cd at low levels down. to 0.01ug Cd/l in seawater by anodic stripping voltammetry with a precision RSD of 6% and recovery of 92.5% is described. The method was based mainly on the principle of the positive "coordinating effect" of metallic ions during plating.In analysis, a sensitive AD-1 model polerography of Chinese manufacture and its mercury-film electrode was used without any preliminary treatment of the sample. The deoxygenation process was simply performed by adding 3 drops of saturated Na2SO3 solution to 50m1 of seawater sample without passing N2-gas.The total time for a plating and stripping cyae was 6 min.
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