Abstract
Determination of copper in sea water was studied by graphite furnace atomic absorption spectrometry (GFAAS). Cu (II) ions were preconcentrated by a precipitation methodusing Al (III) ions and sodium diethyldithiocarbamate (DDTC) at pH7. The precipitate containing copper was collected on a melnbrane filter paper, and then dissolved with 30ml of HNO3(1+12), followed by evaporation to drylless. The sample solution for GFAAS was obtained by redissolving the evaporation residue ith 10ml of HNO3(1+12). It was possible to determine Cu (II) ions without any interfering effects of the copresence ions in sea water. The limit of detection and the limit of determination were 0.7μg/l, 2.4μg/l, respectively. This method was satisfactorily applied to the determination of Cu (II) ions in sea water.
