Abstract
A simple and sensitive method for the spectrophotometric determination of molybdenum in seawater was studied. Molybdenum could be quantitatively and selectively extracted with α-benzoin oxime into chloroform from 0.1 moldm-3 hydrochloric acid solution. Chloroform phase was trans ferredin another vessel and was evaporated to dryness. Then sensitive color-producing reagent, dimethylaminophenylfluorone (DMAPF), solution to form a molybdenum-DMAPF complex by the ligand exchange reaction between molybdenum-α-benzoinoxime complex and DMAPF in the presence of cetyltrimethylammonium bromide, was added to the evaporated residue, that is, molybdenum-α-benzoinoxime complex. Molybdenum was determined in coastal sea-water collected at Abashiri harbor, and the result obtained was 10.1μgdm-3, which was in agreement with the reported value.
