These tools will no longer be maintained as of December 31, 2024. Archived website can be found here. PubMed4Hh GitHub repository can be found here. Contact NLM Customer Service if you have questions.


Pubmed for Handhelds

PUBMED FOR HANDHELDS

Search MEDLINE/PubMed

  • Title: Ligandless-dispersive liquid-liquid microextraction of trace amount of copper ions.
    Author: Mohammadi SZ, Afzali D, Baghelani YM.
    Journal: Anal Chim Acta; 2009 Oct 27; 653(2):173-7. PubMed ID: 19808110.
    Abstract:
    In the present work, a new ligandless-dispersive liquid-liquid microextraction (LL-DLLME) method has been developed for preconcentration trace amounts of copper as a prior step to its determination by flame atomic absorption spectrometry. In the proposed approach 1,2-dicholorobenzene and ethanol were used as extraction and dispersive solvents, respectively. Some factors influencing on the extraction efficiency of copper and its subsequent determination were studied and optimized, such as the extraction and dispersive solvent type and volume, pH of sample solution, extraction time and salting out effect. Under the optimal conditions, the calibration curve was linear in the range of 1.0 ng mL(-1)-0.6 microg mL(-1) of copper with R(2)=0.9985. Detection limit was 0.5 ng mL(-1) in original solution (3S(b)/m) and the relative standard deviation for seven replicate determination of 0.2 microg mL(-1) copper was +/-1.4%. The proposed method has been applied for determination of copper in standard and water samples with satisfactory results.
    [Abstract] [Full Text] [Related] [New Search]