期刊
JOURNAL OF ANALYTICAL CHEMISTRY
卷 69, 期 3, 页码 243-247出版社
MAIK NAUKA/INTERPERIODICA/SPRINGER
DOI: 10.1134/S1061934814030022
关键词
dispersive liquid-liquid microextraction; spectrophotometry; heavy metals; mean centering
资金
- post-graduate office of Guilan University
A new dispersive liquid-liquid microextraction (DLLME) method for preconcentration of trace quantities of Fe(II) and Cu(II) followed by their spectrophotometric determination has been developed. For the extraction, an appropriate mixture of ethanol (the disperser solvent) and carbon tetrachloride (the extraction solvent) was injected rapidly into the water sample containing Fe(II) and Cu(II) after formation of complexes with diethyldithiocarbamate. Mean centering (MC) of ratio spectra has been used for simultaneous determination of Fe(II) and Cu(II). Linear range of the method is 1.0-100 ng/mL for Fe(II) and 0.3-100 ng/mL for Cu(II), the detection limit is 0.53 ng/mL and 0.14 ng/mL Cu(II), resp. The interference effect of some anions and cations is reported. The method was applied to the determination of Fe(II) and Cu(II) in well water samples.
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