キサントゲン酸錯体の活性炭への吸着分離/原子吸光法による底質中の微量金属の定量(<特集>環境汚染物質の分析化学)

概要

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The selective adsorption of metal ions with activated carbon (AC) and potassium o-ethyl dithiocarbonate (potassium Xanthogenate) was studied for the preconcentration of traces of Cd (II), Pb (II), Cu (II) and Co (II) ions. To the sample solution of about 100cm^3, 120mg of potassium Xanthogenate and 50mg of AC were added, and the mixture was stirred for 20min in a ultrasonication bath and filtered. AC was heated with l cm^3 of concentrated nitric acid. After nitric acid was evaporated, adsorpted metals were desorbed in the bath using 5cm^3 of 3mol dm^<-3> nitricacid and the AC was removed by filtration. The concentrations of the metal ions in the solution were measured by AAS. The proposed method was successfully applied to the determination of the trace metals in bottom sediments such as pond (NIES, No. 2), river and marine environment by AAS. The results obtained for pond sediment were in excellent agreement with certified values. This method is very simple, and suitable for the determination of race amounts of Cd, Cu, Pb and Co in the sample containing large amounts of Fe and Al.
社団法人日本分析化学会の論文
1987-03-05