- 作者: Mohammad B. Gholivand*, Shahin Sobhani and Fahimeh Khirdoosh
- 作者服務機構: Department of Chemistry, Razi University, Kermanshah, Iran
- 中文摘要:
A solid uncharged complex produced from 2-aminocyclopentene-1-dithiocarboxylic acid (synthetic reagent) on naphthalene provides a very sensitive, selective and economical method for the preconcentration and determination of trace amounts of copper in drug and alloy samples. The 2-aminocyclopentene-1-dithiocarboxylate of copper is retained quantitatively on microcrystalline naphthalene in the pH range 2.8-3.3. After filtration the solid mass consisting of copper complex-naphthalene is dissolved with 4 mL of dimethylformamide (DMF). The absorbance is measured at 462 nm with a spectrophotometer against the reagent blank and molar absorptivity found to be 2.8 ’ 105 liter mol-1 cm-1. Beer’s law is obeyed over the concentration range of 0.1-16.0 mg of copper in 4 mL of the dimethylformamide solution.
Detection limit is 3 ng mL-1 [signal to noise ratio = 2]. Ten replicate determinations on a sample containing 1 mg of copper gave a relative standard deviation of 0.76%. The interference of a large number of anions and cations have been studied and the optimized conditions developed were utilized for determination of copper in various real samples. - 英文摘要: --
- 中文關鍵字: Copper; Spectrophotometry; 2-Aminocyclopentene-1-dithiocarboxylic acid; Solid liquid extraction.
- 英文關鍵字: Copper; Spectrophotometry; 2-Aminocyclopentene-1-dithiocarboxylic acid; Solid liquid extraction.