- 作者: S. M. Sirry* and G. M. Taha
- 作者服務機構: Chemistry Department Aswan Faculty of Science, South Valley University, Aswan, Egypt
- 中文摘要: An extraction-spectrophotometric method for the determination of trace amounts of copper and cobalt based on their extraction into n-pentanol with o.carboxyphenylhydrazoethylacetoacetate (O.CPHEAA) was performed. Copper was extracted from pH 6.0 - 8.0 and ionic strength 0.5 M - KCl. The maximum absorption of the extracted Cu(II) - O.CPHEAA complex (1:1 & 1:2 species) occurs at 415 nm. The proposed method succeeded in assaying a concentration of 3 - 63 mg per 10 mL of n-pentanol (e = 1.25 ’ 104 L mol-1 cm-1). The method failed to extract cobalt ion into various organic solvents over a pH range of 2-11. The suggested method is highly selective and sensitive according to a wide scheme of interference studied. Copper in some plant samples was accurately estimated using the suggested method. The obtained results and the results of the AAS method were consistent. The reproducibility test shows a relative standard deviation of 1%. Sandell sensitivity for A = 0.001 is 5 ’ 10-3 mg cm-2.
- 英文摘要: --
- 中文關鍵字: Copper; Cobalt; Extraction-spectrophotometric determination-O.Carboxyphenylhydrazoethyl acetoacetate.
- 英文關鍵字: Copper; Cobalt; Extraction-spectrophotometric determination-O.Carboxyphenylhydrazoethyl acetoacetate.