摘要或動機

以微型實驗的方式用螯合劑：dithizone(diphenyl thiocarbazone)在四氯化碳中對金屬離子銅(Ⅱ)、鉛(Ⅱ)、鋅(Ⅱ)進行溶劑萃取與反萃取的平衡所得條件，以及由金屬離子與螯合劑結合時的莫耳數比與分離條件的探討得知，僅僅由控制溶液之pH值便可以使水溶液中的銅、鉛、鋅離子分離。於本研究中所使用之萃取光度分析法，對銅可以測至0-0.1ppm，鉛可以測至0-5.0ppm，鋅可以測至0-0.8ppm；莫耳吸光率分別為：Cu[HDz]₂：4.50x10⁴
L/moles‧cm(550nm)。Pb[HDz]₂：6.85x10⁴ L/moles‧cm(520nm)。Zn[HDz]₂：9.50x10⁴ L/moles‧cm(540nm)。其結果可做為重金屬離子廢水淨化效能之微型檢測指標。


The microscale experiment that the equilibrium of extraction and back extraction
of Cu(Ⅱ)、Pb(Ⅱ)、and Zn(Ⅱ) with the extraction of chelate agent- diphenyl thiocarbazone(dithizone)
in carbon tetrachloride were investigated. The conditions of extraction and back
extraction of pH_1/2 and the stability of these chelate compounds have the possibility
to separate these Cu(Ⅱ)、Pb(Ⅱ)、and Zn(Ⅱ) mental ions in aqueous solution or in water
sample mutually.


The separation and determination of Cu(Ⅱ)、Pb(Ⅱ)、and Zn(Ⅱ) up to
0~1ppm(Cu), 0~5ppm(Pb), 0~0.8ppm(Zn) with dithizone in CCl₄ by extraction
spectrophotometry has been established.

The molar absorptivity expresssed in Lmol^-1cm^-1

was found to be 4.50x10⁴(550nm)for Cu[HDz]₂, 6.85x10⁴(520nm) for Pb[HDz]₂, 9.50x10⁴(540nm) for Zn[HDz]₂, respectively.