- 作者: 劉高家秀 ; 鄭彩鴻 ; 楊敦雄 等
- 作者服務機構: 台灣師範大學化學系
- 中文摘要: Two chelating reagents, disodium N,N'- dibenzylethylenebisdithiocarbamate (1) and disodium piperazinebisdithiocarbamate (2), were synthesized and used to preconcentrate trace metals in aqueous samples. For analysis of Cu(II) using a UV-vis spectrometer, Beer's law was obeyed from 5.0.mu.g/L to 6.0mg/L for reagent 1, and from 0.2mg/L to 6.0mg/L for reagent 2. The chelation ratio for reagent 1 to Cu(II) was determined to be 1:1, with a formation constant 1.0*10/sup 9//M. The dependence of extraction and extraction efficiency of reagent 1 on pH was also studied with an atomic absorption spectrometer for nine heavy-metal ions---Cu(II), Fe(III), Pb(II), Co(II), Cr(VI), Ni(II), Zn(II), Mn(II) and Cd(II). Except Cr(VI) and Mn(II), the recovery yields of the other seven metal ions were almost quantitative at pH=4-6. The recovery was 82% for Cr(VI) at pH=4-5, and 52% for Mn(II) at pH=6-7.
- 英文摘要: --
- 中文關鍵字: Bisdithiocarbamate; Atomic Absorption Spectrometry (Aas); Formation Constant; Heavy Metal; Aquatic Sample
- 英文關鍵字: 雙二硫氨甲酸;原子吸收光譜;穩定度常數;重金屬;水樣